Aston Villa are confident that Libor Kozak will return from a broken leg in time to play a full part in pre-season.
The 24-year-old striker has been sidelined since suffering the unfortunate injury in a training ground collision with Ciaran Clark in January.
Villa boss Lambert told the Birmingham Mail: "He's doing great.
"That's him off the crutches now. I think he's in a much happier place within himself now as well.
"The thing with Kozak is he's a top boy, so you know that with his rehabilitation he'll knuckle down.
"He'll not cut any corners. He'll have good days and bad days because of the mental stress of it, but he will do his utmost to get fit.
"He's on course. We're hoping that pre-season he'll not be too far away. Libor is definitely doing well.
"He was down when the whole thing happened and for a few weeks after that.
"But I saw him the other day and we were having a chat. I think coming off the crutches will be a major step, considering the amount of time he's been on them."
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