Lampard was forced out of training on Wednesday with a thigh injury, a problem that England's doctors will assess on Thursday before making a decision on his fitness for the tournament in Poland and Ukraine.

Liverpool midfielder Jordan Henderson has already been notified of the injury and put on standby.

"Frank Lampard has today (Wednesday) pulled up in training with a thigh injury," the FA confirmed.

"He will have a scan and be assessed by the England medical team tomorrow (Thursday).

"Jordan Henderson has been put on standby notice as cover whilst Lampard continues to be monitored."

Lampard, who won the Champions League with Chelsea this season, has played in every one of England's games at international tournaments since 2002.

He was named in the the  final 23-man squad for the Euros when it was submitted to UEFA on Tuesday, but players can be still be substituted before the tournament's start as long as an independent examination from a UEFA doctor confirms that a player is too injured to play.

England are due to face Belgium at Wembley in their final friendly before the tournament begins. Their first game of the group stage is against France on June 11.

England manager Roy Hodgson has already been forced to make one late amendment to his squad, after Gareth Barry was ruled out of the tournament with a stomach tear.

Henderson had been expected to replace the Manchester City midfielder, but Hodgson opted instead to bolster his defensive ranks with the versatile Phil Jagielka.

Barry's withdrawal came after third-choice goalkeeper John Ruddy was also forced out after breaking his finger.