Still, he looked to be in command after taking the first two sets.But Fonseca, who kept pushing Djokovic back with his big forehand, broke early in the third set and held on to it.In the fifth set, Djokovic frantically tried to find ways to recover some energy against an opponent 20 years younger but he couldn't hide his fatigue: He hunched over the advertising boards, his forearms dangling; slumped back in his chair with a towel on his head; grabbed his head with his hands.He was gracious in defeat."I told him [after the match] that he deserved to win and he should be proud of himself Found incredible shots."Djokovic said he was unsure if he would play at the French Open next year, although he said the same after his semifinal defeat to Sinner last year.AAP/AP