1/20
Jannik Sinner of Italy reacts as he feels unwell because of the heat during the second round men's singles tennis match against Juan Manuel Cerundolo of Argentina at the French Open tennis tournament in Paris, as temperature rises up to 33 C (91 F). | Photo: AP/Aurelien Morissard
2/20
Sweats fly off as Karen Khachanov of Russia returns to Arthur Gea of France during the first round men's singles tennis match at the French Open tennis tournament in Paris. | Photo: AP/Aurelien Morissard
3/20
Alex De Minaur of Australia attends a break during the first round men's singles tennis match against Toby Samuel of Britain at the French Open tennis tournament in Paris. | Photo: AP/Christophe Ena
4/20
Novak Djokovic of Serbia covers by a towel during a break of the first round men's singles tennis match against Giovanni Mpetshi Perricard of France at the French Open tennis tournament in Paris. | Photo: AP/Emma Da Silva
5/20
Emma Navarro of the U.S. returns to Iva Jovic of the U.S. during their second round women's singles tennis match at the French Open tennis tournament in Paris. | Photo: AP/Aurelien Morissard
6/20
Jannik Sinner of Italy cools himself with the water during a break at the second round men's singles tennis match against Juan Manuel Cerundolo of Argentina at the French Open tennis tournament in Paris. | Photo: AP/Thibault Camus
7/20
A visitor sits in a shade at the French Open tennis tournament in Paris. | Photo: AP/Aurelien Morissard
8/20
A woman cools herself with a portable fan during the first round men's singles tennis match between Alex De Minaur of Australia and Toby Samuel of Britain at the French Open tennis tournament in Paris. | Photo: AP/Christophe Ena
9/20
A man cools himself with water from sprinklers at the French Open tennis tournament in Paris. | Photo: AP/Christophe Ena
10/20
Visitors cool themselves with water from sprinklers during a hot day at the French Open tennis tournament in Paris. | Photo: AP/Aurelien Morissard
11/20
A stadium worker sprays the court with water before the first round men's singles tennis match at the French Open tennis tournament in Paris. | Photo: AP/Aurelien Morissard
12/20
Ballboys and ballgirls cover themselves of the sun in a shade at the French Open tennis tournament in Paris. | Photo: AP/Christophe Ena
13/20
Camilo Ugo Carabelli of Argentina casts a shadow as he serves to Andrey Rublev of Russia during their second round men's singles tennis match at the French Open tennis tournament in Paris. | Photo: AP/Aurelien Morissard
14/20
Visitors wait for a break to enter the first round men's singles tennis match between Jannik Sinner of Italy and Clement Tabur of France at the French Open tennis tournament in Paris. | Photo: AP/Thibault Camus
15/20
Visitors watch as Camilo Ugo Carabelli of Argentina serves to Andrey Rublev of Russia during their second round men's singles tennis match at the French Open tennis tournament in Paris. | Photo: AP/Christophe Ena
16/20
Novak Djokovic of Serbia, right, returns to Valentin Royer of France during their second round men's singles tennis match at the French Open tennis tournament in Paris. | Photo: AP/Thibault Camus
17/20
Jasmine Paolini of Italy serves to Solana Sierra of Argentina during their second round women's singles tennis match at the French Open tennis tournament in Paris. | Photo: AP/Aurelien Morissard
18/20
Spectators watch the second round men's singles tennis match between Tomas Machac of the Czech Republic and Alexander Zverev of Germany at the French Open tennis tournament in Paris. | Photo: AP/Christophe Ena
19/20
Jannik Sinner of Italy cools himself with the ice during the second round men's singles tennis match against Juan Manuel Cerundolo of Argentina at the French Open tennis tournament in Paris. | Photo: AP/Thibault Camus
20/20
Stadium workers spray the court with water during the first round women's singles tennis match between Coco Gauff of the U.S. and Taylor Townsend of the U.S. at the French Open tennis tournament in Paris. | Photo: AP/Christophe Ena
