Andy Murray looks to seal World Tour Finals semi-final place
Andy Murray hopes to recover from his epic win over Kei Nishikori in time to face Stan Wawrinka at the ATP World Tour Finals on Friday.
The Briton, 29, needed a tournament-record three hours and 20 minutes to see off Nishikori on Wednesday.
He returns to London's O2 Arena 48 hours later knowing he must take a set off Wawrinka to ensure a semi-final place.
Murray will play the Swiss third seed at 14:00 GMT on Friday.
- The match will be live on BBC Two, online and Radio 5 live sports extra.
- Read more: Wimbledon to remain on BBC until 2024
Nishikori takes on Marin Cilic in the evening session at 20:00, with the Japanese player also able to claim one of the two semi-final places from the John McEnroe Group.
Murray needs to qualify for the last four to maintain his hopes of ending 2016 as the world number one, ahead of Novak Djokovic.
The only way Murray can be eliminated after winning his opening two matches is with a straight-set defeat by Wawrinka, followed by a Nishikori win over Cilic.
To win the group and avoid playing Djokovic in the semi-finals, Murray must either win, or lose in three sets and hope Nishikori beats Cilic in three sets.
"Obviously it's important to win matches to give yourself the best chance to go through, and 200 points for each match here is quite a lot as well," said Murray.
Asked if he was optimistic he could recover from Wednesday's lengthy match sufficiently to challenge Wawrinka, the Scot told BBC Sport: "I haven't thought about that.
"I'm just getting up each day and trying to give the best of what I have on that day.
"I'll just try to use a good rest day to recover. Hopefully I won't be too stiff and sore come Friday, but it's not ideal to play matches of that length at this stage of the season."
Wawrinka played poorly in a swift defeat by Nishikori on Monday but improved dramatically to beat Cilic and resurrect his hopes on Wednesday.
The Swiss, 31, lost to Murray in their only meeting this year at the French Open but won last year's group-stage contest at the O2 Arena.
And the US Open champion has no qualms about potentially knocking out the home favourite.
"I don't care at all," said Wawrinka. "All I know is if I want to have a chance to qualify, I need to win. That's all I know. That's all I'm trying to do.
"I'm going to try to play my best tennis, to beat the world number one."
John McEnroe Group qualification scenarios
- If Murray beats Wawrinka and Nishikori beats Cilic, Murray wins the group and Nishikori is second
- If Murray beats Wawrinka and Cilic beats Nishikori, Murray wins the group and Nishikori is second
- If Wawrinka beats Murray and Cilic beats Nishikori, Wawrinka wins the group and Murray is second
- If Wawrinka beats Murray in 2 sets and Nishikori beats Cilic in 2 sets, Nishikori wins the group and Wawrinka is second
- If Wawrinka beats Murray in 2 sets and Nishikori beats Cilic in 3 sets, Wawrinka wins the group and Nishikori is second
- If Wawrinka beats Murray in 3 sets and Nishikori beats Cilic in 2 sets, Nishikori wins the group and Murray is second
- If Wawrinka beats Murray in 3 sets and Nishikori beats Cilic in 3 sets, Murray wins the group and Nishikori is second
Murray in numbers
- 124 - aces fired down by Murray during his unbeaten sequence.
- 2.8m - prize money, in British pounds, won by Murray since he last lost.
- 5 - sets he has dropped in the last 21 matches.
- 63 - when Murray plays Stan Wawrinka on Friday, 63 days will have passed since he last lost a match - to Juan Martin del Potro on Davis Cup duty.
- 46 - Murray is still 25 wins short of the open era record of 46 consecutive wins, achieved in 1977 by Argentine Guillermo Vilas.
- 2 - Murray has had two walkovers during his run of victories, when opponents pulled out before scheduled matches. Walkovers are not counted in winning streaks.
- 22 - Murray is one win from matching his career-best 22-match undefeated run from earlier this season, during which he won the Queen's Club, Wimbledon and Olympic titles.
- 8 - The Scot has now won a tour-leading eight titles in 2016.