Andrew Flintoff has vowed to battle through the pain to complete the Ashes series for England, starting on Thursday with the Third Test at Edgbaston.
With the team still reeling from the loss of Kevin Pietersen to Achilles surgery yesterday, Flintoff's availability has become even more important as the talismanic all-rounder aims to end his Test career on a high note.
Persistent injuries will force Flintoff to focus on the shorter form of the game after this summer, but he is determined not to let anything prevent him from playing in the final three Tests.
"There are no guarantees for anybody. But I have three Test matches left, and I'd do anything to get through, maybe put myself through things I wouldn't do if I was looking more long term," he said.
"I will do whatever it takes to get out on the field. If I don't it has to be something extremely serious. The encouraging thing was that I bowled regularly over 90mph at Lord's.
"The knee was sore on Tuesday and it's still sore but I'll rest up in front of the telly for the next few days and then get ready for Edgbaston."
England seamer James Anderson is expecting Andrew Flintoff to line up alongside him in attack in next week's third Ashes Test at Edgbaston.
Anderson told BBC Radio Five Live: "Obviously Fred performed fantastically well this week with a knee injury and if he is able to bowl 90mph with this injury I think he'll play.
"But it's obviously down to Fred, if he thinks he can get through the three Tests we have got left.
"If he thinks it is maybe going to put him out of the last two he may miss the next one, but we have got a week's rest now so hopefully he can put his feet up and be fit for a week on Thursday."