Roger Federer believes his 2015 season was "nearly great" but admits Novak Djokovic's brilliant form stopped the Swiss legend achieving everything that he wanted to.

Speaking ahead of his appearance in the Dubai leg of the IPTL tennis event in the UAE, the 34-year-old was happy to have reached two Grand Slam finals during the season and is determined to prove the doubters wrong next year again.

– VIDEO: Federer on rivals Nadal and Djokovic