Andrew Flintoff has travelled to Jamaica to have a scan on the side strain he suffered on the opening day of England's tour match against a St Kitts & Nevis XI.
The 31-year-old was unable to take the field on the second day at Warner Park after straining his side during a net session shortly before the opening day's play.
Flintoff will return to the England team hotel later on Monday and the results of the scan - which the management stress is being undertaken as a precautionary measure - are expected shortly after.
It was a side strain that caused the all-rounder to miss the home series against New Zealand last summer and the England camp will be hoping the most recent injury is not as serious.
Nottinghamshire paceman Stuart Broad will play the remainder of the three-day game in place of the Lancastrian.
As well as losing Flintoff, England were also forced to withdraw Owais Shah, who smashed an unbeaten 125 on Monday but was unable to take the field due to blurred vision.
The Middlesex batsman has suffered a scratched cornea and all-rounder Graeme Swann will deputise for him for the rest of the match.