Reports from London say that Mardy Fish was barely walking after his 7-6 (4), 6-1 defeat to Jo-Wilfried Tsonga in the ATP World Tour Finals. Fish, 29, was also beaten by Rafael Nadal in his opening match and came into the tournament nursing a hamstring injury. But he will go forward and face Roger Federer in his final group match on Thursday.

"I feel like I can win," Fish said. "I felt like I could win both the matches I already played, and I didn't. So we'll see how I turn up tomorrow. You're going to have to pry me off the court to not be able to compete in an event like this. I worked very hard this past year, these past two years, made a lot of sacrifices. These are the rewards, playing in an event like this."