LOL at people thinking Costa will flop for us based on his performances for Spain. We play differently to Spain and in a way that suits him much better. Besides he wasn't even that bad yesterday, they tried to be a bit more direct in the first half and release the ball to him quicker and he did well to win the penalty.
Anyway there is still a possibility that he could flop for us which means we shouldn't sell Lukaku. If Costa is a flop/injured it means we'll be stuck with Ba/Torres just like 2012 which wasn't fun, at least last season we had Eto'o.