Tennis: Dimitrov forced to retire injured while two sets up against Sinner [SOUND]

# Tennis: World number one Jannik Sinner of Italy is through to the Wimbledon quarterfinals after Bulgarian Grigor Dimitrov was forced to retire injured while leading, 6-3, 7-5, 2-2. Serbia’s Novak Djokovic battled past Australian Alex de Minaur, 1-6, 6-4, 6-4, 6-4, to make his 16th Wimbledon quarterfinal. American Ben Shelton and Italian Flavio Cobolli are also through to the last eight. Sinner says it is regrettable how the match ended: