Surrey boss Alec Stewart says Chris Tremlett is back to his best and ready to take on Australia if England need him at Old Trafford.
The fast bowler was a surprise name in the England squad for the third Ashes Test in Manchester, with Graham Onions and Steven Finn both dropped.
Tremlett has not been in the England frame since suffering a back injury in the UAE in January 2012.
But the big fast bowler has proved his fitness with Surrey this season, and the England medical team put him through his paces during the second Test at Lord's.
And Stewart says that Tremlett is capable of reproducing the form which saw him take 17 wickets in three Ashes Tests on the last tour of Australia.
"I've been very happy to say that Chris is back to being an international bowler again," Stewart told Metro. "He has now jumped ahead of Steven Finn and Graham Onions and I know how highly Andy (Flower) rates him.
"He impressed Andy, fast-bowling coach David Saker and the medical team during that game at Lord's. Everything that came back from those tests and the amount of bowling he has been doing show Chris to be in very good condition.
"He is near to the level he found in that last Ashes tour. You can see that from the way he bowled in our Championship games at Yorkshire and then against Nottinghamshire at The Kia Oval.
"Credit must go both to Chris and the medical staff at Surrey for getting him back into this position. He has had back operations and a knee injury but he and the medical and strength and conditioning teams have put in hours of hard work.
"Now he is bowling better and better as he has trusted his body. He is strong in the mind, he has had a taste of Ashes success and he wants to play for England again.
"It's not just about natural ability but mental strength, too. In the dark times, after an operation, when you've been in the physio's room or doing the hard yards in the gym, you've always got that England cap there to remind you that you want more of it."