It's not so simple to just stay in the moment and trust your game and your strength that you can turn it around.

My favorite shot is always gonna be the forehand. It used to always be my favorite shot when I was young, so it's the one I've won all the points with.

I can walk around screaming, 'I have 17 Grand Slams. I have the record here or there.' When you can play for history and you do it, that's what is so really cool, is that you can then be compared to other greats or you've passed another great, even though it doesn't mean you're better than him. But it's just like that moment you've gone into the unknown where nobody else has ever been before.

I used to do a lot of video analysis early on, but more for pleasure and looking at my own technique.

I have a very strong opinion. I'm absolutely against it. I'm against the challenge system. I'm for the way it is right now. Don't change that.

You can be stubborn and successful or you can give it up a bit and change things around. For me it's important to have a bit of both.

My aim over the next few months is that I have a lot of points to defend in Miami and Hamburg, after that I can set my sights on No. 1.