John Terry was undergoing a "precautionary scan" on his right foot after taking a knock in training. The Chelsea captain suffered the injury during a training session at the club's Cobham complex and Chelsea stressed that he was "walking freely" after the incident.
But the injury scare will be a worry for Terry and Chelsea boss Carlo Ancelotti ahead of Saturday's FA Cup final clash with Portsmouth. It will also be of concern to England coach Fabio Capello, who announced his provisional 30-man World Cup squad on Tuesday.
"He left Cobham walking freely in a protective boot, and we await the results which are expected on Thursday."