Serbia's Novak Djokovic celebrates after beating Italy's Flavio Cobolli during a quarterfinal men's singles match at the Wimbledon Tennis Championships in London.

Serbia's Novak Djokovic celebrates after beating Italy's Flavio Cobolli during a quarterfinal men's singles match at the Wimbledon Tennis Championships in London.

Italy's Flavio Cobolli reacts as he leaves the court after losing to Serbia's Novak Djokovic during a quarterfinal men's singles match at the Wimbledon Tennis Championships in London.

Stefan and Tara, the children of Serbia's Novak Djokovic smile after their father beat Italy's Flavio Cobolli in a quarterfinal men's singles match at the Wimbledon Tennis Championships in London.

Serbia's Novak Djokovic embraces Italy's Flavio Cobolli after him in a quarterfinal men's singles match at the Wimbledon Tennis Championships in London.

Italy's Flavio Cobolli returns to Serbia's Novak Djokovic during a quarterfinal men's singles match at the Wimbledon Tennis Championships in London.

Italy's Flavio Cobolli returns to Serbia's Novak Djokovic during a quarterfinal men's singles match at the Wimbledon Tennis Championships in London.

Serbia's Novak Djokovic returns to Italy's Flavio Cobolli during a quarterfinal men's singles match at the Wimbledon Tennis Championships in London.

Serbia's Novak Djokovic returns to Italy's Flavio Cobolli during a quarterfinal men's singles match at the Wimbledon Tennis Championships in London.