Fiorentina coach Cesare Prandelli admits he's having to reign in new signing Christian Vieri in preseason training.

Vieri had a double knee operation last year and Prandelli says: "'Christian Vieri has 'hunger' and wants to return. But he must be careful he doesn't come back too soon The positive thing is that he has not missed one training session, or even one training exercise.

"He's progressing very well from a physical point of view."