"I always try to adjust to the situation." — Novak Djokovic

Joking around is part of my personality, just who I am.

Tennis players we're always playing in center courts that feel like arenas. And when we get on the court and the crowd cheers your name or salutes you - it's like you're a gladiator in the arena. And everyone is cheering - and you're fighting, you're screaming, during your strokes - it feels like you're an animal, fighting for your life.

My mother is a special story. She went through so much to bring us up, four men at home, especially when our country was going through really difficult times.

I haven't been in tennis for that long, but what I can say is that we have a lot of young guys at the top who are willing to do a lot of good things for tennis in general.