The striker has been unavailable since mid-February after he suffered a problem in training followed by an illness but is available for selection against Liverpool on Sunday.
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"He trained Wednesday morning, so he is back. He got a kick - one of the lads caught his foot. It was a bit tender to kick the ball but it could have been worse. He is OK now."
With his side firmly embroiled in the battle to avoid relegation from the Premier League, Lambert added that he is hopeful that a whole season spent scrapping at the bottom has taught his men enough to emerge unscathed.
"We have been round and about there all season so we are handling the pressure of it and it is not new for [the players]," the Villans boss opined.
"They know what they have to try and do. When you start winning games you pull other teams into it who will feel edgy."