Derby manager Nigel Clough is looking to sign an experienced centre-half in the summer.
With captain Shaun Barker recovering from knee surgery and set to miss the beginning of next season, and 20-year-old Mark O'Brien also sidelined beyond August as he recovers from a knee operation, Jake Buxton and stand-in skipper Richard Keogh are the only experienced central defenders on the books at Pride Park.
Speaking to reporters on Wednesday ahead of Derby's trip to Blackburn, Clough said: "We have to get someone in because of the injuries to Shaun Barker and Mark O'Brien.
"We have Jake Buxton and Richard Keogh, and then young Valentin Gjokaj.
"I think we are at that stage where we have got enough youngsters in the squad and coming through from the academy, so any targets we have this summer will be experienced Championship players."