Novak Djokovic dedicated his victory over Roger Federer at the ATP World Tour Finals to his ill father.
The world number one beat Federer 7-6 (8-6) 7-5 to win the season-ending title at London's O2 Arena and later revealed how he had been motivated by his father Srdjan, who is reportedly suffering from an acute respiratory illness.
"This was a title for him," said the 25-year-old Serb to the BBC. "He's much better now. At a certain stage it was very critical. We didn't know what tomorrow brings, but now he's much better and he's recovering.
Djokovic won in London to add the trophy to his recent successes in Japan and China and he has bounced back well after losing his US Open crown to Andy Murray in September.
But he needed two hours and 14 minutes to take two sets in a match of high quality. And it is the second time Djokovic has won the ATP finale, following his triumph in Shanghai four years ago.
"I was just trying to hang in there," said Djokovic. "It's not the first time that Roger started so well against me. I've experienced before his aggression, really trying to put his mark on the match."
In terms of grand slam and tournament wins, 2011 was more lucrative for Djokovic. But despite just the one major this year - the Australian Open back in January - the Serb is delighted with his work. Make no mistake, he is the man to beat in 2013.
"All in all, it was a fantastic year where I've had to face a lot of difficulties off the courts as well," he added.
"Especially coming into this tournament, having my father fighting his own fight for health gave me extra strength that I wanted to play for him in a way, that's one of the reasons I really gave it all every match."
By Thomas Haylett – Feature Writer over at www.poker.co.uk, a place for poker chat, tips and strategy