Nicholls is Hammarby's number one. Think of them like Coventry - they dropped Nicki Pedersen over the winter and went for "strength in depth", as you did. Now you might think that squad systems cover for it, but Tomasz Gapinski, their other big hitter has been injured all season, and they have been plagued by other injuries along the way. Effectively, it's the equivalent of the Coventry team (minus Andersen) losing Harris and not being able to have a facility for him. They're already having to use Zagar to cover for Gapinksi, and Dobrucki is just back from injury himself. Effectively, this decision could ultimately see Hammarby relegated.
Edit: that was in reply to Sandie.