Andrew Murray has become a teenage superstar on the court, ever since his thrilling performances at the US Open, Wimbledon and the Thailand Open.
He's now launched a cool new kind of game called raw tennis. But what's it all about?
Sportsround caught up with Murray to find out more:
Raw tennis is about quick-fire matches and tricks. What's so great about it?
You can just come and have good fun with your friends. It's not a competition to see who's the best, and you can just come along and have fun.
You've leapt up the world rankings from the 400s to number 64 in just a few months, and you could elbow Tim Henman off the UK number spot. What's it like having all that pressure?
I have a life outside tennis, and just when I go on the tennis court, it's just something I do. I enjoy doing it and when I'm off the court I'm just a normal person.
What are your goals over the next couple of months? Do you have targets for where you want to be?
I just want to get myself in very good shape for the start of the year and to work on my game, and work on all of my weaknesses.
I'm just looking forward to starting the year. If I start well in Australia, I've a good chance of getting a seeding around Wimbledon time.