Great Britain's Andy Murray has admitted that he is considering withdrawing from the ATP World Tour Finals in London.
The 24-year-old, who lost his opening match of the competition to David Ferrer earlier today, is suffering with a groin problem.
Murray required treatment from the physio during his defeat to Ferrer and believes that injury could force him to pull out of the event.
"I'll decide tomorrow whether or not I will keep playing," Murray told a press conference. You've sometimes got to do the right thing.
"I played today and it didn't feel particularly great.
"We will have to see how I feel tomorrow."
Should he continue to participate, Murray will need to beat world number one Novak Djokovic and Tomas Berdych to have any realistic chance of qualifying for the semi-finals.
