IBM: See tennis in a new way. Tennis data + IBM = More than the score.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 5
> Men's Doubles Second Round :: Steve Johnson/Sam Querrey vs. Leander Paes/Fernando Verdasco
> Women's Singles Third Round :: Daria Kasatkina vs. Kristina Mladenovic
> Women's Singles Third Round :: Elina Svitolina vs. Ekaterina Makarova
> Men's Singles Third Round :: Benoit Paire vs. Tommy Robredo
> Men's Singles Third Round :: Marin Cilic vs. Mikhail Kukushkin
Day 4
> Women's Singles Second Round :: Johanna Konta vs. Garbine Muguruza
> Women's Singles Second Round :: Camila Giorgi vs. Sabine Lisicki
> Women's Singles Second Round :: Karin Knapp vs. Angelique Kerber
> Women's Singles Second Round :: Kateryna Bondarenko vs. Simona Halep
> Men's Singles Second Round :: Tomas Berdych vs. Jurgen Melzer
> Women's Singles Second Round :: Sara Errani vs. Jelena Ostapenko
> Men's Singles Second Round :: Steve Darcis vs. Roger Federer
> Men's Singles Second Round :: Stan Wawrinka vs. Hyeon Chung
> Women's Singles Second Round :: Petra Kvitova vs. Nicole Gibbs
> Women's Singles Second Round :: Petra Cetkovska vs. Caroline Wozniacki
> Women's Singles Second Round :: Victoria Azarenka vs. Yanina Wickmayer
> Women's Singles Second Round :: Andrea Petkovic vs. Elena Vesnina
> Women's Singles Second Round :: Evgeniya Rodina vs. Samantha Stosur
> Women's Singles Second Round :: Flavia Pennetta vs. Monica Niculescu
> Men's Singles Second Round :: Ruben Bemelmans vs. Jack Sock
> Men's Singles Second Round :: Adrian Mannarino vs. Andy Murray
> Men's Singles Second Round :: Robin Haase vs. Richard Gasquet
> Men's Singles Second Round :: Nicolas Mahut vs. Guillermo Garcia-Lopez
> Men's Singles Second Round :: Bernard Tomic vs. Lleyton Hewitt
> Men's Singles Second Round :: John Isner vs. Mikhail Youzhny
> Men's Singles Second Round :: Aljaz Bedene vs. Donald Young
Day 3
> Men's Doubles First Round :: Bob Bryan/Mike Bryan vs. Steve Johnson/Sam Querrey
> Women's Singles Second Round :: Lauren Davis vs. Ekaterina Makarova
> Women's Singles Second Round :: Eugenie Bouchard vs. Polona Hercog
> Men's Singles Second Round :: Marin Cilic vs. Evgeny Donskoy
> Women's Singles Second Round :: Jessica Pegula vs. Dominika Cibulkova
> Women's Singles Second Round :: Anastasia Pavlyuchenkova vs. Anett Kontaveit
> Women's Singles Second Round :: Madison Brengle vs. Anna Tatishvili
> Women's Singles Second Round :: Serena Williams vs. Kiki Bertens
> Men's Singles Second Round :: Mikhail Kukushkin vs. Grigor Dimitrov
> Men's Singles Second Round :: Fabio Fognini vs. Pablo Cuevas
> Women's Singles Second Round :: Irina Falconi vs. Venus Williams
> Women's Singles Second Round :: Bethanie Mattek-Sands vs. Coco Vandeweghe
> Women's Singles Second Round :: Madison Keys vs. Tereza Smitkova
> Women's Singles Second Round :: Magda Linette vs. Agnieszka Radwanska
> Men's Singles Second Round :: Novak Djokovic vs. Andreas Haider-Maurer
> Men's Singles Second Round :: Sam Groth vs. Tommy Robredo
> Men's Singles Second Round :: Diego Schwartzman vs. Rafael Nadal
> Men's Singles Second Round :: Mardy Fish vs. Feliciano Lopez
> Men's Singles Second Round :: Jo-Wilfried Tsonga vs. Marcel Granollers
> Men's Singles Second Round :: Filip Krajinovic vs. David Ferrer
> Men's Singles Second Round :: Milos Raonic vs. Fernando Verdasco
Day 2
> Men's Singles First Round :: Bernard Tomic vs. Damir Dzumhur
> Women's Singles First Round :: Alexandra Dulgheru vs. Angelique Kerber
> Women's Singles First Round :: Marina Erakovic vs. Simona Halep
> Women's Singles First Round :: Andrea Petkovic vs. Caroline Garcia
> Women's Singles First Round :: Varvara Lepchenko vs. Kirsten Flipkens
> Women's Singles First Round :: Victoria Azarenka vs. Lucie Hradecka
> Men's Singles First Round :: Leonardo Mayer vs. Roger Federer
> Women's Singles First Round :: Jamie Loeb vs. Caroline Wozniacki
> Women's Singles First Round :: Francesca Schiavone vs. Yanina Wickmayer
> Women's Singles First Round :: Lucie Safarova vs. Lesia Tsurenko
> Women's Singles First Round :: Timea Babos vs. Samantha Stosur
> Women's Singles First Round :: Carina Witthoeft vs. Garbine Muguruza
> Men's Singles First Round :: John Isner vs. Malek Jaziri
> Men's Singles First Round :: Victor Estrella Burgos vs. Jack Sock
> Men's Singles First Round :: Donald Young vs. Gilles Simon
> Men's Singles First Round :: Stan Wawrinka vs. Albert Ramos-Vinolas
> Men's Singles First Round :: Nick Kyrgios vs. Andy Murray
> Men's Singles First Round :: Sam Querrey vs. Nicolas Mahut
> Men's Singles First Round :: Thanasi Kokkinakis vs. Richard Gasquet
> Men's Singles First Round :: Tomas Berdych vs. Bjorn Fratangelo
Day 1
> Women's Singles First Round :: Madison Keys vs. Klara Koukalova
> Women's Singles First Round :: Belinda Bencic vs. Sesil Karatantcheva
> Women's Singles First Round :: Dominika Cibulkova vs. Ana Ivanovic
> Women's Singles First Round :: Serena Williams vs. Vitalia Diatchenko
> Men's Singles First Round :: Marin Cilic vs. Guido Pella
> Women's Singles First Round :: Eugenie Bouchard vs. Alison Riske
> Men's Singles First Round :: Matthew Ebden vs. Grigor Dimitrov
> Women's Singles First Round :: Kateryna Kozlova vs. Bethanie Mattek-Sands
> Women's Singles First Round :: Monica Puig vs. Venus Williams
> Women's Singles First Round :: Lauren Davis vs. Heather Watson
> Women's Singles First Round :: Coco Vandeweghe vs. Sloane Stephens
> Women's Singles First Round :: Anna Tatishvili vs. Karolina Pliskova
> Men's Singles First Round :: Fabio Fognini vs. Steve Johnson
> Men's Singles First Round :: Novak Djokovic vs. Joao Souza
> Men's Singles First Round :: Milos Raonic vs. Tim Smyczek
> Men's Singles First Round :: Kei Nishikori vs. Benoit Paire
> Men's Singles First Round :: Borna Coric vs. Rafael Nadal
> Men's Singles First Round :: Illya Marchenko vs. Gael Monfils
> Men's Singles First Round :: Fernando Verdasco vs. Tommy Haas
> Men's Singles First Round :: Marco Cecchinato vs. Mardy Fish
> Men's Singles First Round :: Radu Albot vs. David Ferrer