On-loan Liverpool goalkeeper David Martin has returned to the Premier League club following his one-month spell at Derby.
The 24-year-old was signed when first-choice keeper Stephen Bywater was injured and his understudy Saul Deeney was suspended.
Martin stepped in for two matches, at Doncaster and against Middlesbrough at Pride Park.
"He has been a fantastic professional during his time with us, working exceptionally hard on the training ground and when he did play he didn't put a foot wrong," boss Nigel Clough told the club's official website.
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