A physical battle
Though he exhibited resilience in the fourth set, Alcaraz never recovered the momentum as Djokovic seized the opportunity to race to victory.
“First and foremost, I have to say tough luck for Carlos,” Djokovic said. “Obviously, at this level the last thing you want is cramps and physical problems, during the late stages of the Grand Slam, so I feel for him, I feel sorry – I hope he can recover and he can come back very soon.
“I told him at the net, he knows how young he is. He's got plenty of time ahead of him – he's going to win this tournament, I'm sure, many, many times. He's an unbelievable player and an incredible competitor.
“It’s tough obviously for him to not know whether he should retire the match or finish the match in the way he did. But congratulations to him for fighting spirit and hanging in all the way to the last last point – respect for that, great respect.”