Tomas Berdych faces Marin Cilic and Novak Djokovic takes on Stanislas Wawrinka on day four at the ATP World Tour Finals at the O2 Arena in London.
Where to Watch
Tomas Berdych v Marin Cilic is live on BBC Two, Sky Sports HD3 and BBC Radio Five Live Sports Extra from 2pm.
Novak Djokovic v Stanislas Wawrinka is live on Sky Sports HD3 and BBC Radio Five Live Sports Extra from 8pm.
Tomas Berdych and Marin Cilic will have been licking their wounds after winning just two games on their way to losing inside an hour in their opening round robin matches but must regroup if they are to reignite their semi-final challenge.
Though the slow playing surface at the O2 Arena plays into neither player's hands, both will be expected to go out all guns blazing in search of their first win of the tournament.
The Czech Berdych, making his fifth straight appearance at the season-ending finals, is the marginal favourite having won five of the pair's nine meetings. However Cilic has won three of the last four on his way to winning the US Open and in both previous duels in London.
The result of the match in the afternoon session will dictate which of Djokovic or Wawrinka can qualify for the last four with victory on Wednesday night.
Djokovic has lost just three times to Wawrinka in 18 previous meetings, prevailing in 14 of the last 15 matches but was undone in the Australian Open quarter-finals when he succumbed to a five-set defeat in Melbourne.
The Serbian looked imperious in defeating Cilic in his group opener and having knocked Wawrinka out at the last four stage in 2013 will be keen on continuing his progress towards ending the year as world No.1.
What they said:
Tomas Berdych: "This is a very unique tournament. You come up, starting to play group matches, you started with the best players in the world. You have no time to start up or play first round with, you know, someone who is little bit lower on the ranking, get some rhythm and find the way."
Marin Cilic: "Tomas is that kind of guy that he's getting along well with everybody on the tour. We played, you know, few times this year. Most of those matches were pretty important. It was the finals at Rotterdam, twice at the Grand Slams, now again here. For both of us, is definitely the most important match now in the group. Whoever wins is going to have a chance to go through."
Novak Djokovic: "This is a unique format. Of course, winning in straight sets helps a lot for the rest of the tournament. But I'm going to try to win every match I play, obviously. But it does help for, you know, qualifications for the semifinals eventually and so forth. Hope I can just continue playing this well."
Stanislas Wawrinka: "Yeah, I think I show from the beginning of the year, already from last year, that my level is there. When I feel good on the court, I'm ready to beat everybody. It's never easy, but you have to fight for it. Normally when you play the top‑10 guys, you are in the quarters or semifinals of a tournament. So the confidence is there. I'm feeling great mentally."
Betting odds (source: William Hill):
Tomas Berdych 6/5 v Marin Cilic 4/6
Novak Djokovic 1/6 v Stanislas Wawrinka 4/1