Tomas Berdych and Stanislas Wawrinka kick-off the opening day at the O2 Arena before Juan Martin del Potro takes on Richard Gasquet
Where to Watch
Tomas Berdych v Stanislas Wawrinka is live on Sky Sports HD3 and BBC Two HD no later than 2pm GMT. Live commentary is available on BBC Radio 5 live sports extra.
Juan Martin del Potro v Richard Gasquet is live on Sky Sports HD3 no later than 8pm GMT.
Even in the absence of Wimbledon champion and British No.1 Andy Murray, the season ending ATP World Tour Finals in London is accompanied by all the fanfare of previous years and is once again set to be the definitive test for the world's top ranked players.
Day one sees the tournament's dark horses get the week underway. In the afternoon session Tomas Berdych takes on Stanislas Wawrinka in group A while in the evening Juan Martin del Potro meets Richard Gasquet in Group B.
Wawrinka is playing in his first tour finals after the finest year of his career. The Swiss has emerged from the shadow of Roger Federer and produced best-ever performances at the French and US Open, reaching the last four at Flushing Meadows in September.
Meanwhile, Berdych is making his fourth successive appearance at the tour finals and will be hoping to improve on one semi-final finish in three outings. The Czech reached the quarter final at both the Australian Open and Wimbledon but hasn't won a tour title in 2013 despite reaching three finals.
Despite being ranked world No.6 Berdych has a losing head-to-head record against Wawrinka having lost their last two meetings including on the hard courts at the US Open.
In the evening, Del Potro takes on Gasquet who is making his first appearance at the tour finals since 2007. The Argentine Del Potro starts the tournament as a dark horse but his campaign started in disastrous circumstances after his suitcase was stolen on route to London.
Del Potro has since been drawn in a group with Federer and defending champion Novak Djokovic to make his task of reaching the knock-out phase even tougher but will at least feel confident of earning a wining start in the English capital against Gasquet.
With a 5-1 head-to-head record, Del Potro is the overwhelming favourite against his French counterpart whose renaissance in 2013 saw him reach the semi-final at the US Open. That performance has backed up three wins on tour, most recently at the Kremlin Cup where he defeated Mikhail Kukushkin.
What they said
Tomas Berdych: The reason why you practise hard is for this. When you step on court here at this arena, it's one of the best feelings you can get on a tennis court. It's very close to Centre Court in Wimbledon. This atmosphere is very special and unique. I really enjoy it."
Stanislas Wawrinka: "When I came on the tour, this was not my goal. It was maybe a dream. Now, after many years of work and on the tour, I have a chance to be able to go there. I'm very close. I really hope I will be able to experience this tournament and to have my own locker. It's an incredible status."
Juan Martin del Potro: "I arrived to this tournament with the remaining energy I have. It's true I'm the player with most tournaments played in the last month. At this high level, that can make a difference, but I'll try to be prepared and do my best in each match."
Richard Gasquet: "Last year I saw the wonderful stadium. It was full for the entire tournament. "It was important for me to qualify this year. It was my goal at the start of the season. I'm proud to be there with all these great players. I will try my best to play well."