Italy's Lorenzo Musetti celebrates as he won the quarterfinal match of the French Tennis Open against Frances Tiafoe of the U.S. at the Roland-Garros stadium in Paris.

Winner Italy's Lorenzo Musetti, right, and Frances Tiafoe of the U.S. shake hands after their quarterfinal match of the French Tennis Open at the Roland-Garros stadium in Paris.

Italy's Lorenzo Musetti, left, plays a shot against Frances Tiafoe of the U.S. during their quarterfinal match of the French Tennis Open at the Roland-Garros stadium in Paris.

Italy's Lorenzo Musetti plays a shot against Frances Tiafoe of the U.S. during their quarterfinal match of the French Tennis Open at the Roland-Garros stadium in Paris.

Frances Tiafoe of the U.S. reacts as he plays against Italy's Lorenzo Musetti during their quarterfinal match of the French Tennis Open at the Roland-Garros stadium in Paris.

Italy's Lorenzo Musetti, right, plays a shot against Frances Tiafoe of the U.S. during their quarterfinal match of the French Tennis Open at the Roland-Garros stadium in Paris.

Italy's Lorenzo Musetti, left, plays a shot against Frances Tiafoe of the U.S. during their quarterfinal match of the French Tennis Open at the Roland-Garros stadium in Paris.

Italy's Lorenzo Musetti plays a shot against Frances Tiafoe of the U.S. during their quarterfinal match of the French Tennis Open at the Roland-Garros stadium in Paris.

Frances Tiafoe of the U.S. plays a shot against Italy's Lorenzo Musetti during their quarterfinal match of the French Tennis Open at the Roland-Garros stadium in Paris.

Frances Tiafoe of the U.S. plays a shot against Italy's Lorenzo Musetti during their quarterfinal match of the French Tennis Open at the Roland-Garros stadium in Paris.