Derby County have completed the capture of teenage German midfielder Tom Koblenz after he impressed in a trial spell at Pride Park.
The 19-year-old, who spent time with Kaiserslautern and Hoffenheim in his native country, has signed a two-year deal with the Rams.
Boss Steve McClaren said on the club's website: "I am pleased that Tom Koblenz sees his future at Derby County and I would like to welcome him to the club.
"We are building for the future and Tom is another young player who will benefit hugely from working with the Under-21 development squad, alongside a number of exciting young prospects."