Andy Murray spent two hours debating whether to play on at the ATP World Tour Finals, and concluded that his body had made the decision for him.
The third-ranked Briton pulled out of the season-ending tournament yesterday with a groin strain he sustained in training a week before his opening match.
After struggling through a straight-sets loss to David Ferrer, Murray decided to take the safe option after conversations with his support group.
"I was just trying to find reasons why I should try to play," Murray said. "But, you know, there was no real positives [to] coming out and playing because yesterday I was really unhappy on the court. I wasn't enjoying it at all.
"This is one of the best tournaments in the year, one that I think me and all of the players look forward to playing. I couldn't give anywhere near my best."