Sinner about being a tennis champion: "I believe we are people who are very good in what we do and so yeah we are automatically also an inspiration for younger people - but that's it, no? We are not changing the world or whatever, so why change ourselves with success?"
That was part of a post-win question from Tennis Australia about what kind of champion he wants to be in people's eyes, to which his reply was "I want to be just a humble person to be honest."
I think him wanting to absolutely keep his head on his shoulders at all times, and keep a sense of perspective on what he's actually doing in the grand scheme of things, is part of the secret to his consistent mentality.
It's also the change in mentality that helped Madison Keys, when she stopped giving absolute importance to winning a slam and tennis achievements and she started to find her self worth outside of that. That allowed her to play more serenely, enjoy her time on court and actually incidentally guided her to have the right mindset to win her first major title.
It's also still a major issue for some top players though. Thiem talked about how the biggest mistake in his career was thinking that winning a slam would change everything and would make him a happier player; and among active pros Zverev definitely comes to mind as someone who is so obsessed by the thought of winning one that it actually hampers him in those big matches.
In order to win a major, you actually have to enjoy playing for it more than you enjoy the thought of holding the trophy itself.