Novak Djokovic dramatically retired from his Australian Open semi-final against Alexander Zverev after being unable to play through a torn muscle in his upper left leg before admitting there is a “chance” may have played at the tournament for the final time.

If it seems as if there’s always something going on with Novak Djokovic at Grand Slam tournaments, that’s because there usually is. Even Djokovic himself acknowledged as much as he prepared to face Alexander Zverev in the Australian Open semifinals Friday after taking painkillers for a hurt left leg.