Roger Federer takes on Kei Nishikori before Andy Murray faces Milos Raonic on day three at the ATP World Tour Finals at the O2 Arena in London.
Where to Watch
Roger Federer v Kei Nishikori is live on BBC Two, Sky Sports HD3 and BBC Radio Five Live Sports Extra from 2pm.
Andy Murray v Milos Raonic is live on Sky Sports HD3 and BBC Radio Five Live Sports Extra from 8pm.
Day three sees the return of Group B at the ATP World Tour Finals where Federer will be seeking to all-but secure a place in the semi-final, and continue his pursuit of the year-end world No.1, against debutant Nishikori.
Both players prevailed in straight sets in their opening round robin match and can begin preparing for the last four should either win on Tuesday afternoon. The pair's career head-to-head sees them locked at 2-2, with Federer having emerged victorious in their last meeting in Halle.
Nishikori does have a victory over Federer in 2014 however, on the hard courts of Miami and will be looking to call on the same inspiration which saw him reach the US Open final and overcome Murray in convincing fashion on day one.
The home favourite Murray stands a defeat away from a premature exit in London, the city where he won Olympic gold and the Wimbledon title, and faces an opponent in Raonic against whom he has a losing career record.
The 23-year-old won in their only meeting this season, in Indian Wells and also won in Tokyo in 2012. The Canadian's serve caused regular problems for Federer in his opening match and could prove to be the undoing of Murray, who endured a horrid start to his campaign against Nishikori.
What they said:
Roger Federer: "I didn't put any target I think on the rankings. I was putting more rather a target on trying to win an amount of titles, because last year I had only won one. That was quite disappointing actually, so I was trying to get maybe three to five at least. That was the goal."
Kei Nishikori: "I try not to think, you know, I can't beat these guys, because I've been beating those top‑10 guys already. You know, this is even first time for me to play to a Final."
Andy Murray: "Well, I don't necessarily go into every match against all the top players expecting to win. You want to win the match. That's obviously the goal all the time. It's harder to qualify when you lose your first match. That's pretty obvious."
Milos Raonic: "Things are going to be quite different than the first match. We both [me and Murray], after today, have more so of an idea what we need to do different for the next round. It's going to be about who necessarily adjusts better, who can play better come Tuesday night."
Betting odds (source: William Hill):
Roger Federer 2/5 v Kei Nishikori 19/10
Andy Murray 4/7 v Milos Raonic 11/8