Argentina's Diego Schwartzman reacts as he plays Spain's Rafael Nadal during their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Thibault Camus)

Spain's Rafael Nadal shouts as he plays Argentina's Diego Schwartzman 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 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)

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)

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)

Argentina's Diego Schwartzman stretches to return the ball to Spain's Rafael Nadal 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 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)

Spain's Rafael Nadal returns the ball to Argentina's Diego Schwartzman 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)

Spain's Rafael Nadal waves after defeating Argentina's Diego Schwartzman in their quarterfinal match of the French Open tennis tournament at the Roland Garros stadium Wednesday, June 9, 2021 in Paris. (AP Photo/Thibault Camus)

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)