Novak Djokovic overcame a worrying knee injury and a big second-set deficit to reach his fourth Olympic semi-final.
The Serbian defeated Stefanos Tsitsipas 6-3, 7-6 (7/3), but only after aggravating a right knee injury that required surgery in June.
Djokovic needed on-court medical attention after slipping on Philippe Chatrier's baseline.
He trailed 0:4 and then 2:5 in the second set, but fought back and saved three set points in the ninth game.
The 24-time Grand Slam winner, still in search of a first Olympic gold medal, cruised through the tiebreak to record his 12th win in 14 meetings against the Greek.
For a place in the gold match, he will face Italian tennis player Lorenzo Musetti. | BGNES
