During Friday's press conference Alcaraz was questioned on the strength and depth of men’s tennis, and the world No.2 is wary of underestimating his rivals further down the rankings.
“I think in general, the top 20, 25, 30, they have really high level of tennis. We could see it right now, for example, (Jakub) Mensik is 20, 21 (world No.19) and he won Miami. That means how strong is the top 30 right now,” he said.
“Ten years ago, the top 10 was much stronger than now, could be, but in general, the top 30 I think right now is really, really strong.
“We have a really open draw that everyone can make really good results or even win the tournament, so I think that's really good for tennis.”