Djokovic not sure if he can keep playing at Australian Open

MELBOURNE, Australia (AP) — Novak Djokovic says he has a torn muscle after falling during his five-set victory over American Taylor Fritz in the Australian Open’s third round. Djokovic seemed to be cruising along to a 17th consecutive win against a U.S. opponent when his left foot gave out from under him as he tried to change directions early in the third set. Djokovic took a medical timeout for treatment on his side and later was helped more by a trainer. Fritz got back into the match but couldn’t pull off the upset as Djokovic eventually played a bit better in the fifth set.