Vitesse Arnhem coach Peter Bosz says they're in regular contact with Chelsea.
Vitesse currently have Chelsea players Wallace, Josh McEachran and Bertrand Traore on-loan this season. Bosz says he and technical director Mo Allach have contact once a fortnight with "the people of Chelsea".
Indeed, Vitesse are already speaking with the Blues with an eye on next season.
Bosz said: "We will again see which players may be available. We'll see who we can choose and for what positions. We will also do our own scouting."