Djokovic slipped on the grass Wednesday after a forehand attempt led to a return from Cobolli that hit the net cord and made Djokovic lean to his left. His leg then bent awkwardly on the turf at the All England Lawn and Tennis Club.

Djokovic, who is looking for a record-equaling eighth Wimbledon title and a record-breaking 25th Grand Slam title, battled and then surged past the Italian No. 22 seed Cobolli 6-7 (6), 6-2, 7-5, 6-4 to set up Friday’s date with Sinner.