All eyes will be on the battle between world No 1 Novak Djokovic and Rafael Nadal as we head to The O2 in London for the last time.

The top eight singles players in the world qualify for the prestigious season-ending championships at the greatest of venues this November.

Reigning Wimbledon and Australian Open champion Novak Djokovic will be aiming to win a record-equalling sixth title and with Roger Federer missing this year, he will be favourite to land it ahead of Rafael Nadal, who has never won the event.

What a debut for Greek star Tsitsipas, 21, who defeated Daniil Medvedev and last year's winner Alexander Zverev to make it through to the knockout stages where he upset seven-time winner Roger Federer.

In the final, he came through an exhausting battle to defeat Thiem and became the youngest winner of the year-end championship since Lleyton Hewitt in 2001.

Bulgaria's Dimitrov became the first man for 19 years to win the ATP Finals on his debut appearance.

Ireland captain Johnny Sexton remains optimistic about running out at Twickenham against England next weekend.

Sexton was looking sharp as he added one conversion and kicked two penalties before limping off with a suspected hamstring injury

Sexton's replacement Billy Burns also went off in the second period, which will give Ireland head coach Andy Farrell potential cause for concern ahead of next weekend's clash, but Sexton believes he can recover in time.

"It doesn't feel too serious. Just very frustrating. I thought initially I was going to be able to run it off but unfortunately not," said Sexton.

Meanwhile, Farrell felt his side were worthy winners: "I thought it was better than a 10-point lead at half-time and then second half a little bit disjointed at times but I thought Wales did a good job on our speed of ball and breakdown, it just stopped a little bit of continuity.

"Overall I thought it was a dominant performance and the scoreline is a reflective one, I would have thought."