World number one Novak Djokovic has revealed that winning the French Open is one of his "biggest goals" for the 2015 season.

The 27-year-old has won titles at the Australian Open, Wimbledon and the US Open, but the main prize at Roland Garros has so far eluded him.

Speaking after he had won the ATP World Tour Finals trophy last night for the third year in a row following Roger Federer's injury, Djokovic expressed his determination to add the Coupe des Mousquetaires title to his collection.

"Roland Garros is and was and still will be one of the biggest goals that I have. I'll keep on trying, of course," he told reporters.

"Any Grand Slam win is another page in the history books of this sport. Right now I'm at my pinnacle. I feel physically very fit. I'm very motivated to keep on playing on a very high level."

Djokovic reached the final in Paris in 2012 and earlier this year, but on both occasions he was defeated by Rafael Nadal.