England all-rounder Andrew Flintoff could miss the World Twenty20 due to ongoing problems with his left ankle.
Flintoff, 29, is consulting a specialist after feeling discomfort following the fourth match of the NatWest Series against India last Thursday.
The Lancastrian missed Sunday's defeat at Headingley with the problem, and no decision on his participation in the remaning two fixtures has yet been made.
Flintoff underwent surgery earlier in the summer, bringing the total number of operations on his left ankle to three.
"He is seeing the surgeon who performed his third ankle operation later on this afternoon - and we will go on from there," said chairman of selectors David Graveney on Tuesday.
"He's not ruled out of tomorrow - but at the same time, he is not definite to go to the Twenty20, because we have to wait for that medical opinion tomorrow."
Sussex all-rounder Luke Wright had already been called into England's NatWest Series squad as cover for Flintoff and Ravinder Bopara.
Bopara has been ruled out of the final two ODIs against India and the World Twenty20 with a broken thumb.
England have a further injury worry for the World Twenty20 concerning fast bowler Chris Tremlett, who is struggling with a foot injury.
"He's (Tremlett) got an inflamed ligament and had an injection in his foot yesterday," Graveney told Sky Sports News.
"We're waiting for that to settle down and he will be assessed on Thursday to find out if he can participate in the game on Saturday (Lord's).
"But more importantly whether he can take his place in the Twenty20."
Anderson and Bell in contention
Graveney revealed that James Anderson and Ian Bell were the most likely candidates to be called up as replacements in England's Twenty20 squad.
"We are not sure how many people we are going to have to replace as there are a couple of ongoing medical bulletins," added Graveney.
"When we finalise how many injured we have then we will publicly announce the replacements.
"Jimmy (Anderson) and Ian Bell have played exceptionally in all forms of the game.
"But we need to look at the balance of the team and exactly who is missing before we nominate the replacements, but they would be at the forefront of our options."