Andy Murray was back at the O2 Arena on Wednesday afternoon to prepare for Thursday's crunch ATP World Tour Finals clash against Roger Federer. Despite having a day off following his straight-sets win over Milos Raonic on Tuesday night, Murray returned for a hit on the venue's practice courts. Murray had earlier posted pictures on Instagram from behind the scenes as he chilled out by taking advantage of the miniature basketball hoop in the physio room. Andy Murray shoots into a mini basketball hoop (left)   and stretches ahead of training (right) on Wednesday Murray celebrates his win against Milos Raonic to get his ATP World Tour Finals campaign back on track
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Andy Murray meets Roger Federer in their final Group B match at the O2
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British No 1 praised coach Amelie Mauresmo's pep talk before his straight sets win over Milos Raonic on Tuesday
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Raonic faces Kei Nishikori in the opening session on Thursday
Kei Nishikori
@placeholder will give himself a good chance of qualifying for the semi-finals should he beat Raonic
Roger Federer
Roger Federer
If not, playing against @placeholder is a good way for me to finish the year as well.'
Roger Federer
Roger Federer
4) Federer beats Murray in two sets and Raonic beats Nishikori in three sets = @placeholder wins group and Nishikori qualifies second.
Milos Raonic
Milos Raonic
Milos Raonic
Raonic
7) Murray beats Federer in two sets and Nishikori beats Raonic in two sets = @placeholder is out and order of other three determined by percentage of games won.
Kei Nishikori
9) Murray beats Federer in three sets and @placeholder beats Raonic in two sets = Federer wins group and Nishikori qualifies second.