A few years ago, I would probably have voted for Serena Williams, or Maria Sharapova, but now, in my opinion, Bianca Andreescu is the mentally strongest.

I’m a tennis player trying to navigate his way up the rankings and what I seem to be finding is that the further you climb the rankings, the more and more it becomes a mental game. Once you get to a certain level, everyone can play amazing tennis. No one has huge weaknesses in their game...