Chelsea boss Jose Mourinho is convinced about the quality of Marco van Ginkel.
Van Ginkel joined Chelsea last summer from Vitesse Arnhem, but missed the entire season with a serious knee injury.
"I thought it was very unfortunate that he fell away last season due to a serious injury," recalled Mourinho to Vitesse's website.
"Even in his first season, we already had high expectations for Marco.
"He must continue to work hard, but he is a great guy and as a player he has tremendous potential."
