Why are there tennis matches finishing at nearly 4 a.m. at the Australian Open.

Novak Djokovic had to overcome a mid-match lapse before beating Grigor Dimitrov 6-3, 4-6, 6-1 to reach the fourth round of the Italian Open.

Barty didn't wilt, ousting Sabalenka 6-4, 6-7 (5), 6-3 for her third three-set win in four matches at the tournament. Medvedev beat Tiafoe 6-4, 6-3, and has gone 10-1 in sets against the American in their past four head-to-head matchups. Ad“Everywhere in the world there are different conditions and at times it suits you more than other places,” Barty said. Medvedev had 11 aces and showed no signs of wear, two days after cramping in the heat during a third-round win. 21 seed Jannik Sinner of Italy in the quarterfinals; Sinner advanced with a 6-3, 6-2 win over Emil Ruusuvuori of Finland.

The 10th-seeded Frenchman is a two-time Grand Slam semifinalist, but he can't seem to win anywhere at the moment. ___4:55 p.m.U.S. Open champion Dominic Thiem has moved into the second round at the Australian Open, where he was the runner-up to Novak Djokovic a year ago. Thiem had been 0-3 in Grand Slam finals until emerging for the championship at Flushing Meadows in September. The first tournament of this year’s Grand Slam season began after a three-week delay because of the coronavirus pandemic. Serena Williams begins her latest bid for a 24th Grand Slam singles title in the following match against Laura Siegemund.

The French Open is the only Grand Slam tournament that does not use tiebreakers in the final set. 9 seed Johanna Konta 6-3, 6-3 at Court Suzanne Lenglen on Sunday. ___7:30 p.m.Stan Wawrinka made quick work of Andy Murray in their reunion of sorts at the French Open. One of his coaches is Wolfgang Thiem, the father of fellow Austrian Dominic Thiem — the U.S. Open champion, and French Open runner-up the past two years. The 20-year-old Korda beat Andreas Seppi of Italy 6-2, 4-6, 6-3, 6-3.