Tennis photos - Day 6

TOKYO, JAPAN - JULY 29: Ivan Dodig of Team Croatia and Marin Cilic of Team Croatia play Michael Venus of Team New Zealand and Marcus Daniell of Team New Zealand during their Men's Doubles Semifinal match on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Clive Brunskill/Getty Images)

TOKYO, JAPAN - JULY 29: Ugo Humbert of Team France serves during his Men's Singles Quarterfinal match against Karen Khachanov of Team ROC on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Tim de Waele/Getty Images)

TOKYO, JAPAN - JULY 29: Belinda Bencic of Team Switzerland plays a backhand during her Women's Singles Semifinal match against Elena Rybakina of Team Kazakhstan on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Clive Brunskill/Getty Images)

TOKYO, JAPAN - JULY 29: Ugo Humbert of Team France plays a backhand during his Men's Singles Quarterfinal match against Karen Khachanov of Team ROC on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Tim de Waele/Getty Images)

TOKYO, JAPAN - JULY 29: Novak Djokovic of Team Serbia plays a backhand during his Men's Singles Quarterfinal match against Kei Nishikori of Team Japan on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Clive Brunskill/Getty Images)

TOKYO, JAPAN - JULY 29: Novak Djokovic of Team Serbia plays a forehand during his Men's Singles Quarterfinal match against Kei Nishikori of Team Japan on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Clive Brunskill/Getty Images)

TOKYO, JAPAN - JULY 29: Novak Djokovic of Team Serbia plays a backhand during his Men's Singles Quarterfinal match against Kei Nishikori of Team Japan on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Clive Brunskill/Getty Images)

TOKYO, JAPAN - JULY 29: Novak Djokovic of Team Serbia and Nina Stojanovic of Team Croatia play Kevin Krawietz of Team Germany and Laura Siegemund of Team Germany during their Mixed Doubles Quarterfinal match on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Clive Brunskill/Getty Images)

TOKYO, JAPAN - JULY 29: Mate Pavic of Team Croatia and Nikola Mektic of Team Croatia celebrate victory against Austin Krajicek of Team USA and Tennys Sandgren of Team USA during their Men's Doubles Semifinal match on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Tim de Waele/Getty Images)

TOKYO, JAPAN - JULY 29: Daniil Medvedev of Team ROC plays his Men's Singles Quarterfinal match against Pablo Carreno Busta of Team Spain on day six of the Tokyo 2020 Olympic Games at Ariake Tennis Park on July 29, 2021 in Tokyo, Japan. (Photo by Tim de Waele/Getty Images)