WHAT HAPPENED: No. 10 Agnieszka Radwanska beat Yulia Putintseva 7-5, 6-2, on Court 17 to advance to the third round.
Both players struggled on serve throughout the match. In the first set alone, Radwanska was broken twice and Putintseva three times, enough to deliver the set to Radwanska, who broke at 6-5 to claim the set.
Radwanska pulled away in the second, registering 10 winners and only three unforced errors and going 3-for-3 on break-point chances to advance to the third round.
Radwanska, 29, has never made the quarterfinals at the US Open, the only Slam where she hasn't reached the round of 8. She lost the Wimbledon final in 2012 and has made five Grand Slam semifinals since that year. She improved to 3-0 against Putintseva, including a first-round win at the 2016 Australian Open.
WHAT IT MEANS: Radwanska will wait and see who her third-round opponent will be, either American CoCo Vandeweghe or Ons Jabeur from Tunesia, who are opening the evening session.
Putintseva, 22, was a surprise quarterfinalist at the 2016 French Open but hasn't been past the third round at any other Slam.
MATCH POINT: With four of the top 10 seeds having been eliminated (No. 2 Simona Halep, No. 5 Caroline Wozniacki, No. 6 Angelique Kerber, No. 7 Johanna Konta), can Radwanska take advantage?
