Defiant Federer upbeat despite year to forget

Roger Federer insists tennis is in his DNA and that he has no intention of quitting after his worst season came to a downbeat conclusion with a semi-final defeat against Rafael Nadal at the ATP World Tour Finals.
Federer has endured a dismal campaign marred by a series of shock defeats and the 17-time Grand Slam champion was unable to finish on a high note as world number one Nadal sent him crashing out of the season-ending event with a 7-5 6-3 victory yesterday.
After reigning over men's tennis for the best part of a decade, the 32-year-old is undeniably a fading force, prompting some to suggest he may consider hanging up his racquet to focus on life as a father of twin daughters.

But Federer is adamant that is not an option just yet because his love of the sport remains too strong.
"For me, it's pretty simple: this is what I used to do as a little boy. It's something that always is there in your DNA," Federer said.
"Clearly today it's different than when I was 12 years old, but it's just something I enjoy doing.

"The thing is that when you stop, you're still so young that why stop so early? Why just walk away from it because I have many other things to do in my life than play tennis, but because I can still choose, I pick to play.

"As long as I have this choice, I'll keep on playing."
Federer, troubled by a back injury in the first half of the campaign, claims his lack of success over the last 11 months is more down to his body failing him than a lack of hunger.
"Considering the back issues I've had, I'm pleased that I'm pain-free for a long period of time now with a lot of tennis," he said.
"That's definitely going to give me confidence physically and mentally.