DOMINIK KOEPFER

Daniil Medvedev was struggling so much with the suffocating heat and humidity in the Olympic tennis tournament that at one point the chair umpire asked him if he could continue playing.

Roger Federer has moved into the fourth round of a Grand Slam tournament for a record-extending 68th time after coming through a four-set test at the French Open against 59th-ranked Dominik Koepfer of Germany.

Matteo Berrettini has earned his debut trip to the French Open’s fourth round and joined a couple of teenagers from Italy to give their country a trio of men in Week 2 of a Grand Slam tournament for the first time.

Switzerland's Stan Wawrinka plays a shot against Germany's Dominik Koepfer in the second round match of the French Open tennis tournament at the Roland Garros stadium in Paris, France, Wednesday, Sept. 30, 2020. (AP Photo/Alessandra Tarantino)PARIS – A tennis player at the French Open was visibly startled by a sonic boom Wednesday just as he was about to serve a ball. But with no forewarning, residents around Paris — along with fans and players inside Roland Garros — expressed their fears of an explosion on social networks. On Court Suzanne Lenglen, the second-biggest stadium at the French Open, Dominik Koepfer was interrupted mid-serve by the bang's loud clap. Elina Svitolina was playing Renata Zarazua on Court Philippe Chatrier, the tournament's biggest stadium, when she heard the noise.

(AP Photo/Alessandra Tarantino)PARIS – The Latest from the French Open (all times local):___9:35 p.m.American teenager Coco Gauff’s French Open debut has ended in the second round after she double-faulted 19 times in a 4-6, 6-2, 7-5 loss to 159th-ranked qualifier Martina Trevisan. Stefano Travaglia beat the Japanese player 6-4, 2-6, 7-6 (7), 4-6, 6-2 in the second round of the French Open after nearly four hours. 2-seeded Spaniard is looking to win his record-extending 13th French Open title and equal Roger Federer’s men’s record of 20 major titles overall. ___2:55 p.m.U.S. Open runner-up Victoria Azarenka is out of the French Open in the second round. They said it was "a fighter plane which has broken the sound barrier.”___12 p.m.Serena Williams is out of the French Open.

FLUSHING, N.Y. - Daniil Medvedev appears to be relishing the role of US Open villain. That changed when Medvedev won match point. "After the match, I engaged a little bit with the crowd," Medvedev said to reporters. "Thank you all, guys, because your energy tonight gave me the win," Medvedev said in an interview on court. He leads the ATP Tour this season with overall match wins (48), wins on hard courts (35) and finals appearances (six).