If you play Sterling alone up front it will only work if the other team play a high line. I wouldn't do it though, he could just get marked out of the game and become isolated, Sturridge looks isolated alone and playing upfront is his actual trade. That and the fact he needs to be rested, don't want to do an Owen on him.
Isn't this why we bought Lambert anyway? I'd rather stick him up front with Lallana/Coutinho coming in to give Raheem a rest.