Novak Djokovic was beaten by a Croatian qualifier 18 years younger than him at the Italian Open on Friday in his first match after two months out due to a right shoulder injury.
Dino Prizmic, 20, defeated the record 24-time Grand Slam champion 2-6, 6-2, 6-4 with an ace on his first match point.
The 38-year-old Djokovic hadn’t played since losing to Jack Draper in the fourth round in Indian Wells, California, in March.
Djokovic had taping on his right shoulder that was revealed when he changed shirts between sets.