SHOWS: LONDON, ENGLAND, UK (NOVEMBER 9, 2018) (REUTERS - ACCESS ALL) 1.
(SOUNDBITE) (English) WORLD NUMBER ONE, NOVAK DJOKOVIC, TALKING ABOUT BECOMING WORLD NUMBER ONE AGAIN, SAYING: "Next to the grand slams and obviously the World Tour Finals, being number one is probably the ultimate challenge in our sport and the pinnacle of the season.
So of course I'm very proud of that achievement." 2.
WHITE FLASH 3.
(SOUNDBITE) (English) WORLD NUMBER ONE, NOVAK DJOKOVIC, TALKING ABOUT BECOMING WORLD NUMBER ONE AGAIN, SAYING: "After February's elbow surgery it looked quite improbable that I'll be in this position as a year-end number one, not just because of the rankings, (being) it was I think 22, but just because of how I felt, how I played.
But there was always a part of me that believed I could make it back.
I never thought it was impossible, I just thought at the time that it might take more time than I wish it to be." STORY: Novak Djokovic heads into next week's ATP Finals in London as the favourite and the Serb wants to cap off his return to world number one with a sixth finals victory which would bring him level with Roger Federer.
The 14-time grand slam champion was speaking at a news conference on Friday (November 9) ahead of next week's season finale which could see him add more gloss to a stellar year which has yielded two grand slams - at Wimbledon and the US Open.
Djokovic also became the first man to complete a career sweep of all nine Masters 1000 Series titles by winning in Cincinnati in August, he then added a fourth Shanghai Masters crown in October.
The Serb has won the ATP Finals on five occasions - including four in a row from 2012.
Djokovic is in the Guga Kuerten group alongside Alexander Zverev, Marin Cilic and John Isner.
Meanwhile, Roger Federer has a target of his own with the Swiss eyeing up a 100th singles title of his career.
The second seed, who last won the event in 2011, faces Kevin Anderson, Dominic Thiem and Kei Nishikori in the Lleyton Hewitt group.