Lambert admits Delph has tried to pick and time his tackles more carefully recently, but remains at risk of being cautioned because of his combative style of play.
"He plays the game that way and can't curtail it, that's the way he plays and he'll miss the game," said Lambert.
"I don't think he was as brash as he was. He has maturity and experience and he has learnt that side of the game. He has been good for me so we'll go again."
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