Zverev described Alcaraz as "a beast. He's an animal. The intensity he plays tennis at is different to other people."
That beast has now won 11 of his 12 Grand Slam matches that have gone to five sets. His champion's mentality is reminiscent of his idol Rafael Nadal.
"You have to give your heart. In those moments, it's where the top players give their best tennis," the Spaniard added.
"I wanted to be one of the best tennis players in the world, so I have to give extra in those moments in the fifth set, I have to show the opponent that I am fresh, I'm like we are playing the first game of the match.
"That works pretty well if the opponents see me that I'm moving well, I'm hitting the good shots, I'm finding good solutions. And of course, the mental strength plays a great part in that moment if you want to win the slams."
On Monday, Jannik Sinner, who Alcaraz toppled in a thrilling semi-final, will rise to world No.1, with the 21-year-old returning to world No.2. Men's tennis is definitely in safe hands.