It felt when I was growing up that sport was, like, the only thing you should do... if you do music, you're really different and a bit weird.

I'm involved in music and fashion a lot more than I used to be, so my style has definitely changed - for the better, of course. It's given me greater insight into what colours work, what looks good on camera, and what I feel comfortable in.

I've only really had one period when I lost myself and felt like I was going to lose my career, and that was when I first began presenting 'X-Factor' spin-off 'The Xtra Factor' two years ago. I was worried if I did a rubbish job live on Saturday night TV that my music career was going to get affected and I would lose everything.

I'm a huge fan of 'Heart On My Sleeve' - I think it has a 'Take That' feel to it! John Shanks and James Morrison wrote the track, and we spoke to Sony and asked if we could reference a 'Greatest Day'/'Rule The World' sound to make that epic ballad. I think it does the job.

You know growing up in Sweden meant we had a lot of rain when we played tennis. We were taught on clay courts but because of the weather, we had to go indoors a lot.

At some point, you have worked so hard in your life and your tennis that you don't want to be too much up and down. You want to do what you have done and eventually get better.

I'm in this sport to win but win by being the best, not by being lucky.

In MMA, you're trained to tune the audience out. In sports entertainment, you're trained to feed off what the audience is thinking and feeling.