Chelsea captain John Terry is undergoing a "precautionary scan" on his right foot after taking a knock in training on Wednesday.
The news comes as a blow for Chelsea's preparations as they attempt to win the double when they face Portsmouth in Saturday's FA Cup final and if it proves to be a more serious problem, his participation in the World Cup could be in doubt.
A statement from the club said: "John Terry has taken a knock in training and has gone to hospital for a precautionary scan on his right foot. He left Cobham walking freely in a protective boot, and we await the results which are expected on Thursday."
It also gives England coach Fabio Capello a headache as he prepares for the World Cup in South Africa and the Italian will undoubtedly be monitoring the situation carefully.
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