Serbia's Novak Djokovic returns the ball to Italy's Matteo Berrettini during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Serbia's Novak Djokovic returns the ball to Italy's Matteo Berrettini during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Italy's Matteo Berrettini reacts as he plays Serbia's Novak Djokovic during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Serbia's Novak Djokovic returns the ball to Italy's Matteo Berrettini during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Tennis lovers support Serbia's Novak Djokovic playing Italy's Matteo Berrettini during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Spectators leave to respect the 11PM curfew due to the COVID-19 pandemic while Italy's Matteo Berrettini plays Serbia's Novak Djokovic in a quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Italy's Matteo Berrettini returns the ball to Serbia's Novak Djokovic during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

A stadium official asks Italy's Matteo Berrettinito to walk back to the cloakroom, giving time for spectators to leave in accordance of the 11PM curfew due to the COVID-19 pandemic while Italy's Matteo Berrettini played Serbia's Novak Djokovic in a quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. The watch was suspended. (AP Photo/Michel Euler)

Spectators leave to respect the 11PM curfew due to the COVID-19 pandemic while Italy's Matteo Berrettini plays Serbia's Novak Djokovic in a quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Serbia's Novak Djokovic reacts during the third set as he plays Italy's Matteo Berrettini during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Serbia's Novak Djokovic reacts as he defeats Italy's Matteo Berrettini in a quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Serbia's Novak Djokovic, right, shakes hands with Italy's Matteo Berrettini after their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Serbia's Novak Djokovic falls as he plays Italy's Matteo Berrettini in a quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Italy's Matteo Berrettini serves the ball as he plays Serbia's Novak Djokovic during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Italian tennis lovers support Italy's Matteo Berrettini playing Serbia's Novak Djokovic during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Italy's Matteo Berrettini returns the ball to Serbia's Novak Djokovic during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Serbia's Novak Djokovic stretches to return the ball to Italy's Matteo Berrettini during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Serbia's Novak Djokovic gets some cream in his hand during a break as he plays Italy's Matteo Berrettini in a quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)

Serbia's Novak Djokovic reacts as he defeats Italy's Matteo Berrettini in a quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Michel Euler)