Hartson wary of wounded beast Bayern

John Hartson insists there's never a good time to be playing Bayern Munich despite the Germans' injury problems for the Champions League match with Celtic.

Ottmar Hitzfeld's side have Sebastian Deisler, Alexander Zickler and Jens Jeremies definitely out while Michael Ballack, Willy Sagnol, Claudio Pizarro, Ze Roberto and Bastian Schweinsteiger are struggling for fitness.