Racing Genk boss Mario Been has praised the recent performances of Kevin de Bruyne, but warned the youngster that if he makes his expected move to Chelsea in the near future, he risks being "left on the bench to rot".
The 20-year-old attacking midfielder has established himself as one of the brightest young prospects in Europe, and was recently rewarded for his scintillating form with a first cap with the Belgian national team.
De Bruyne featured at Stamford Bridge in the recent UEFA Champions League encounter earlier this month, but was left powerless as Genk were condemned to a 5-0 thrashing by Chelsea.
Blues boss Andre Villas-Boas has efficiently gone about his business assembling an exciting, young, and attack-minded squad - and he wants De Bruyne to join his west London revolution.
"Kevin is a huge talent," admitted Been. "But I expect more from him than from others.
"He has a very nice career [ahead of him], but must continue to develop. How many examples are there of talents going abroad only to be left on the bench to rot?"
Suggestions that Chelsea may look to bring De Bruyne to England in January have been met with a word of caution from the Genk boss - who insists the player still has a lot to work on, and should consider remaining in Belgium to continue improving his game.
"He suffers perhaps losing the ball a lot, but you know there comes a moment when he may be decisive," added Been. "Kevin will always risk things in his way of playing.
"He must choose better moments. He is sometimes careless, because he tries too hard to prove himself."