I think Chelsea will win by a big margin against Luton.
My expectation was high before Chelsea played against West Ham, but they ended up disappointing me. I also think Chelsea will win Luton, but I won’t allow my expectation to be so high. But from Chelsea's performance in their last two matches, their performance wasn’t really bad to the point that they wouldn’t be able to win Luton, so I am expecting a win from Chelsea, but I am not really expecting a wide goal margin in the match. Chelsea do not have a goal scoring machine yet, they are really finding it difficult to score, which I notice is one of the things affecting them.
Chelsea are going to win but judging from the last game against West Ham, they might lose again that's if the coach continue with that weak formation and with the players misusing their opportunities.
The team lack that togetherness, they weren't playing as a unit that cost them the game. Sterling was the one creating chances making enough effort to make sure his team get a goal or two.
I have never seen Sterling play like that with so much energy since he left City to join the Blues, if he continues like that I believe Chelsea will get a comfortable win against Luton tomorrow.