Belgium coach Roberto Martinez admits he has concerns about Real Madrid attacker Eden Hazard.

While fully fit, Hazard has been benched by coach Carlo Ancelotti in recent games.

"It's an unusual situation. We didn't expect it to turn out like this," Martinez said in an interview with HLN. "But that's football. I've seen that he's medically fine. He's completely fit. We have a good relationship with Real Madrid. We know that he does an extra job to keep himself as fit as possible. Eden wants to do everything possible to reach his highest level.

"This period of international matches is a great opportunity to play. It is not an ideal situation. But we do not worry until Eden stops enjoying football. At the moment, it is not the case. I think the season can end strong."