Dominik Koepfer

Stefanos Tsitsipas defeated Argentina's Sebastian Baez 7-5, 6-1 in the round of 16 at the Olympic tennis tournament.

After a closely contested first set, Tsitsipas took control in the second set, dominating with his serve.

In the quarterfinals, the Greek champion will face Seriba's Novak Djokovic, who defeated Dominik Koepfer of Germany 7-5, 6-3.

PARIS - Serbia's Novak Djokovic is through to the quarter-finals of the men's tennis singles event at the Paris Olympics after a 7-5, 6-3 win over German Dominik Koepfer in Paris on Wednesday.

Djokovic, who won after an hour and 37 minutes of play, is now 2-0 head-to-head against Koepfer.

AP Photo/Manu Fernandez

AP Photo/Manu Fernandez

AP Photo/Manu Fernandez

PARIS - Serbia's Novak Djokovic is through to the third round of the men's tennis singles event at the Olympic tournament in Paris after a 6-1, 6-4 victory over Spaniard Rafael Nadal on Monday afternoon.

Djokovic, who won after an hour and 44 minutes of play on the Roland Garros centre court, is now 31-29 head-to-head against Nadal.

PARIS - Serbian tennis players Dusan Lajovic and Miomir Kecmanovic are both through to the second round of the Roland Garros men's singles tournament.

Lajovic defeated Russian Roman Safiullin 4-6, 7-5, 6-4, 6-7 (6-8), 6-4 on Monday evening after more than four hours of play.

He will next face the winner of the tie between American Taylor Fritz and Argentine Federico Coria.

ROME - Serbian tennis player Hamad Medjedovic is out of the Rome Masters tournament after a 7-6 (7-5), 2-6, 7-5 defeat to Russian Daniil Medvedev in the third round on Monday evening.

Defending champion Medvedev, who won after two hours and 53 minutes of play, will next face American Tommy Paul, who beat German Dominik Koepfer in the third round.

Novak Djokovic and Carlos Alcaraz are on a U.S. Open collision course as the final Grand Slam tournament of season gets under way Monday with American teenager Coco Gauff chasing a breakthrough first major title.