Lambert praised the influence of Gordon Cowans and Shay Given, whose last game for Villa came in January 2013.
"The two lads have been great," said Lambert. "Gordon, who I know really well, his status at the football club is huge.
"Shay, contrary to what people think because I never played him, I've never had one cross word with him. I respect him as a goalkeeper and as a guy, and he and Gordon accepted within seconds. I'm really appreciative of the help."
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