Tennis' leading expert? Data. Let's build a Smarter Planet.Find Tickets Online at ticketmaster
Player challenge protocol for electronic line calling at the US Open includes three challenges per set plus one for tiebreakers.

In 2006, the US Open became the first Grand Slam to use electronic line calling technology, creating a "2 plus 1" player challenge system. The technology was introduced to improve officiating for players, while increasing the intrigue and excitement for in-stadium fans and television viewers. The new technology was immediately embraced by officials, players and fans.

In 2010, the "3 plus 1" player challenge system was introduced. All professional tennis events where an electronic line calling system is in place, including all Olympus US Open Series events this summer, use the "3 plus 1" protocol.

The on-court player challenge system for review of line calls at the US Open is as follows:
  • Each player is allowed a maximum of three incorrect challenges per set after which they are not permitted to challenge again in that set.
  • If a set goes to a tiebreaker, each player will receive one additional challenge.
  • Challenges may not be carried over from one set to another.

<< Back to Challenge Summary Stats

Select a match to view the challenge point summary for that match.

Day 9
> Women's Doubles Fourth Round :: Venus Williams/Serena Williams vs. Ekaterina Makarova/Elena Vesnina
> Men's Singles Fourth Round :: Grigor Dimitrov vs. Gael Monfils
> Men's Singles Fourth Round :: Marin Cilic vs. Gilles Simon
> Men's Doubles Fourth Round :: Scott Lipsky/Rajeev Ram vs. Eric Butorac/Raven Klaasen
> Women's Doubles Fourth Round :: Martina Hingis/Flavia Pennetta vs. Kveta Peschke/Katarina Srebotnik
> Women's Singles Fourth Round :: Belinda Bencic vs. Shuai Peng
Day 8
> Women's Doubles Third Round :: Kimiko Date-Krumm/Barbora Zahlavova Strycova vs. Su-Wei Hsieh/Shuai Peng
> Mixed Doubles Third Round :: Ashleigh Barty/John Peers vs. Taylor Townsend/Donald Young
> Women's Doubles Third Round :: Cara Black/Sania Mirza vs. Jelena Jankovic/Klara Koukalova
> Men's Doubles Third Round :: Leander Paes/Radek Stepanek vs. Marcel Granollers/Marc Lopez
> Men's Doubles Third Round :: Bob Bryan/Mike Bryan vs. Bradley Klahn/Tim Smyczek
> Men's Doubles Third Round :: Jean-Julien Rojer/Horia Tecau vs. David Marrero/Fernando Verdasco
> Men's Doubles Third Round :: Mikhail Kukushkin/Michael Venus vs. Alexander Peya/Bruno Soares
> Mixed Doubles Third Round :: Abigail Spears/Santiago Gonzalez vs. Cara Black/Leander Paes
> Women's Doubles Third Round :: Alla Kudryavtseva/Anastasia Rodionova vs. Kveta Peschke/Katarina Srebotnik
> Mixed Doubles Third Round :: Yung-Jan Chan/Ross Hutchins vs. Kveta Peschke/Marcin Matkowski
> Mixed Doubles Third Round :: Sania Mirza/Bruno Soares vs. Katarina Srebotnik/Rohan Bopanna
> Women's Singles Fourth Round :: Ekaterina Makarova vs. Eugenie Bouchard
> Women's Singles Fourth Round :: Flavia Pennetta vs. Casey Dellacqua
> Women's Singles Fourth Round :: Aleksandra Krunic vs. Victoria Azarenka
> Women's Singles Fourth Round :: Serena Williams vs. Kaia Kanepi
> Men's Singles Fourth Round :: Novak Djokovic vs. Philipp Kohlschreiber
> Men's Singles Fourth Round :: Jo-Wilfried Tsonga vs. Andy Murray
> Men's Singles Fourth Round :: Kei Nishikori vs. Milos Raonic
> Men's Singles Fourth Round :: Stan Wawrinka vs. Tommy Robredo
Day 7
> Mixed Doubles Second Round :: Hao-Ching Chan/Max Mirnyi vs. Ashleigh Barty/John Peers
> Mixed Doubles Second Round :: Taylor Townsend/Donald Young vs. Andrea Hlavackova/Alexander Peya
> Mixed Doubles Second Round :: Anabel Medina Garrigues/Raven Klaasen vs. Katarina Srebotnik/Rohan Bopanna
> Women's Doubles Third Round :: Vania King/Lisa Raymond vs. Ekaterina Makarova/Elena Vesnina
> Women's Doubles Third Round :: Venus Williams/Serena Williams vs. Garbine Muguruza/Carla Suarez Navarro
> Men's Singles Third Round :: Marcel Granollers vs. Roger Federer
> Men's Singles Third Round :: Gilles Simon vs. David Ferrer
> Men's Singles Third Round :: Marin Cilic vs. Kevin Anderson
> Men's Singles Third Round :: Adrian Mannarino vs. Roberto Bautista Agut
> Men's Singles Third Round :: Tomas Berdych vs. Teymuraz Gabashvili
> Men's Doubles Third Round :: Eric Butorac/Raven Klaasen vs. Guillermo Garcia-Lopez/Philipp Oswald
> Men's Singles Third Round :: Gael Monfils vs. Richard Gasquet
> Men's Singles Third Round :: Grigor Dimitrov vs. David Goffin
> Men's Singles Third Round :: Feliciano Lopez vs. Dominic Thiem
> Men's Doubles Third Round :: Daniel Nestor/Nenad Zimonjic vs. Scott Lipsky/Rajeev Ram
> Women's Singles Fourth Round :: Sara Errani vs. Mirjana Lucic-Baroni
> Women's Singles Fourth Round :: Belinda Bencic vs. Jelena Jankovic
> Women's Singles Fourth Round :: Lucie Safarova vs. Shuai Peng
> Women's Singles Fourth Round :: Maria Sharapova vs. Caroline Wozniacki
Day 6
> Mixed Doubles Second Round :: Yung-Jan Chan/Ross Hutchins vs. Melanie Oudin/Rajeev Ram
> Women's Doubles Second Round :: Misaki Doi/Elina Svitolina vs. Gabriela Dabrowski/Alicja Rosolska
> Women's Doubles Second Round :: Cara Black/Sania Mirza vs. Caroline Garcia/Monica Niculescu
> Men's Doubles Second Round :: Bob Bryan/Mike Bryan vs. Jared Donaldson/Michael Russell
> Men's Doubles Second Round :: Vasek Pospisil/Jack Sock vs. Marin Draganja/Florin Mergea
> Women's Singles Third Round :: Petra Kvitova vs. Aleksandra Krunic
> Women's Singles Third Round :: Barbora Zahlavova Strycova vs. Eugenie Bouchard
> Women's Singles Third Round :: Flavia Pennetta vs. Nicole Gibbs
> Women's Singles Third Round :: Elena Vesnina vs. Victoria Azarenka
> Women's Singles Third Round :: Serena Williams vs. Varvara Lepchenko
> Women's Singles Third Round :: Zarina Diyas vs. Ekaterina Makarova
> Women's Singles Third Round :: Casey Dellacqua vs. Karolina Pliskova
> Women's Singles Third Round :: Kaia Kanepi vs. Carla Suarez Navarro
> Men's Singles Third Round :: Jo-Wilfried Tsonga vs. Pablo Carreno Busta
> Men's Singles Third Round :: Philipp Kohlschreiber vs. John Isner
> Men's Singles Third Round :: Kei Nishikori vs. Leonardo Mayer
> Men's Singles Third Round :: Andrey Kuznetsov vs. Andy Murray
> Men's Singles Third Round :: Novak Djokovic vs. Sam Querrey
> Men's Singles Third Round :: Victor Estrella Burgos vs. Milos Raonic
> Men's Singles Third Round :: Nick Kyrgios vs. Tommy Robredo
Day 5
> Mixed Doubles First Round :: Taylor Townsend/Donald Young vs. Jacqueline Cako/Joel Kielbowicz
> Men's Singles Second Round :: Feliciano Lopez vs. Tatsuma Ito
> Women's Doubles Second Round :: Vania King/Lisa Raymond vs. Christina McHale/Anna Schmiedlova
> Men's Singles Second Round :: Sam Groth vs. Roger Federer
> Men's Singles Second Round :: Jerzy Janowicz vs. Kevin Anderson
> Men's Singles Second Round :: Tim Smyczek vs. Roberto Bautista Agut
> Men's Singles Second Round :: Paolo Lorenzi vs. Richard Gasquet
> Men's Singles Second Round :: Gael Monfils vs. Alejandro Gonzalez
> Men's Singles Second Round :: Tomas Berdych vs. Martin Klizan
> Men's Doubles Second Round :: Leander Paes/Radek Stepanek vs. Yen-Hsun Lu/Jiri Vesely
> Men's Singles Second Round :: Grigor Dimitrov vs. Dudi Sela
> Men's Doubles Second Round :: Michael Mmoh/Francis Tiafoe vs. Scott Lipsky/Rajeev Ram
> Women's Doubles Second Round :: Venus Williams/Serena Williams vs. Oksana Kalashnikova/Olga Savchuk
> Women's Singles Third Round :: Lucie Safarova vs. Alize Cornet
> Women's Singles Third Round :: Johanna Larsson vs. Jelena Jankovic
> Women's Singles Third Round :: Maria Sharapova vs. Sabine Lisicki
> Women's Singles Third Round :: Roberta Vinci vs. Shuai Peng
> Women's Singles Third Round :: Mirjana Lucic-Baroni vs. Simona Halep
> Women's Singles Third Round :: Sara Errani vs. Venus Williams
> Women's Singles Third Round :: Andrea Petkovic vs. Caroline Wozniacki
> Women's Singles Third Round :: Angelique Kerber vs. Belinda Bencic
Day 4
> Women's Doubles First Round :: Timea Babos/Kristina Mladenovic vs. Venus Williams/Serena Williams
> Women's Singles Second Round :: Sorana Cirstea vs. Eugenie Bouchard
> Women's Singles Second Round :: Christina McHale vs. Victoria Azarenka
> Women's Singles Second Round :: Aleksandra Krunic vs. Madison Keys
> Women's Singles Second Round :: Nicole Gibbs vs. Anastasia Pavlyuchenkova
> Women's Singles Second Round :: Karolina Pliskova vs. Ana Ivanovic
> Women's Singles Second Round :: Marina Erakovic vs. Elena Vesnina
> Women's Singles Second Round :: Petra Kvitova vs. Petra Cetkovska
> Women's Singles Second Round :: Catherine Bellis vs. Zarina Diyas
> Women's Singles Second Round :: Samantha Stosur vs. Kaia Kanepi
> Women's Singles Second Round :: Serena Williams vs. Vania King
> Men's Singles Second Round :: Kei Nishikori vs. Pablo Andujar
> Men's Singles Second Round :: Sam Querrey vs. Guillermo Garcia-Lopez
> Men's Singles Second Round :: Jan-Lennard Struff vs. John Isner
> Men's Singles Second Round :: Novak Djokovic vs. Paul-Henri Mathieu
> Men's Singles Second Round :: Matthias Bachinger vs. Andy Murray
> Men's Singles Second Round :: Peter Gojowczyk vs. Milos Raonic
> Men's Singles Second Round :: Simone Bolelli vs. Tommy Robredo
> Men's Singles Second Round :: Nick Kyrgios vs. Andreas Seppi
> Men's Singles Second Round :: Jo-Wilfried Tsonga vs. Aleksandr Nedovyesov
Day 3
> Men's Singles First Round :: Steve Johnson vs. Tatsuma Ito
> Men's Singles First Round :: Grigor Dimitrov vs. Ryan Harrison
> Men's Singles First Round :: Pablo Cuevas vs. Kevin Anderson
> Men's Singles First Round :: Marin Cilic vs. Marcos Baghdatis
> Men's Singles First Round :: Feliciano Lopez vs. Ivan Dodig
> Men's Singles First Round :: Kenny De Schepper vs. Ernests Gulbis
> Men's Singles First Round :: Tomas Berdych vs. Lleyton Hewitt
> Men's Singles First Round :: Jerzy Janowicz vs. Dusan Lajovic
> Men's Singles First Round :: Frank Dancevic vs. Joao Sousa
> Men's Doubles First Round :: Bob Bryan/Mike Bryan vs. Max Mirnyi/Mikhail Youzhny
> Women's Singles Second Round :: Sara Errani vs. Anastasia Rodionova
> Women's Singles Second Round :: Daniela Hantuchova vs. Alize Cornet
> Women's Singles Second Round :: Tsvetana Pironkova vs. Jelena Jankovic
> Women's Singles Second Round :: Madison Brengle vs. Sabine Lisicki
> Women's Singles Second Round :: Shuai Peng vs. Agnieszka Radwanska
> Women's Singles Second Round :: Jana Cepelova vs. Simona Halep
> Women's Singles Second Round :: Timea Bacsinszky vs. Venus Williams
> Women's Singles Second Round :: Aliaksandra Sasnovich vs. Caroline Wozniacki
> Women's Singles Second Round :: Maria Sharapova vs. Alexandra Dulgheru
> Women's Singles Second Round :: Sloane Stephens vs. Johanna Larsson
> Men's Singles Second Round :: Stan Wawrinka vs. Thomaz Bellucci
Day 2
> Women's Singles First Round :: Olga Govortsova vs. Eugenie Bouchard
> Women's Singles First Round :: Samantha Stosur vs. Lauren Davis
> Women's Singles First Round :: Serena Williams vs. Taylor Townsend
> Women's Singles First Round :: Misaki Doi vs. Victoria Azarenka
> Women's Singles First Round :: Jarmila Gajdosova vs. Madison Keys
> Women's Singles First Round :: Grace Min vs. Ekaterina Makarova
> Women's Singles First Round :: Nicole Gibbs vs. Caroline Garcia
> Women's Singles First Round :: Alison Riske vs. Ana Ivanovic
> Women's Singles First Round :: Svetlana Kuznetsova vs. Marina Erakovic
> Women's Singles First Round :: Flavia Pennetta vs. Julia Goerges
> Women's Singles First Round :: Petra Kvitova vs. Kristina Mladenovic
> Men's Singles First Round :: Filip Krajinovic vs. Tim Smyczek
> Men's Singles First Round :: Gael Monfils vs. Jared Donaldson
> Men's Singles First Round :: Kei Nishikori vs. Wayne Odesnik
> Men's Singles First Round :: Marinko Matosevic vs. Roger Federer
> Men's Singles First Round :: Damir Dzumhur vs. David Ferrer
> Men's Singles First Round :: Bernard Tomic vs. Dustin Brown
> Men's Singles First Round :: Denis Istomin vs. Richard Gasquet
> Men's Singles First Round :: Marcos Giron vs. John Isner
> Men's Singles First Round :: Maximo Gonzalez vs. Sam Querrey
> Men's Singles First Round :: Pablo Andujar vs. Jack Sock
Day 1
> Women's Singles First Round :: Angelique Kerber vs. Ksenia Pervak
> Women's Singles First Round :: Andrea Petkovic vs. Ons Jabeur
> Women's Singles First Round :: Amandine Hesse vs. Alize Cornet
> Women's Singles First Round :: Julia Glushko vs. Madison Brengle
> Women's Singles First Round :: Bojana Jovanovski vs. Jelena Jankovic
> Women's Singles First Round :: Sharon Fichman vs. Agnieszka Radwanska
> Women's Singles First Round :: Danielle Rose Collins vs. Simona Halep
> Women's Singles First Round :: Kimiko Date-Krumm vs. Venus Williams
> Women's Singles First Round :: Magdalena Rybarikova vs. Caroline Wozniacki
> Women's Singles First Round :: Sloane Stephens vs. Annika Beck
> Women's Singles First Round :: Maria Sharapova vs. Maria Kirilenko
> Men's Singles First Round :: Mikhail Youzhny vs. Nick Kyrgios
> Men's Singles First Round :: Michael Llodra vs. Daniel Gimeno-Traver
> Men's Singles First Round :: Novak Djokovic vs. Diego Schwartzman
> Men's Singles First Round :: Jo-Wilfried Tsonga vs. Juan Monaco
> Men's Singles First Round :: Robin Haase vs. Andy Murray
> Men's Singles First Round :: Simone Bolelli vs. Vasek Pospisil
> Men's Singles First Round :: Taro Daniel vs. Milos Raonic
> Men's Singles First Round :: Edouard Roger-Vasselin vs. Tommy Robredo
> Men's Singles First Round :: Stan Wawrinka vs. Jiri Vesely
> Men's Singles First Round :: Blaz Kavcic vs. Donald Young