Chelsea aren't in good condition, they're keep draw for the past 2 matches and lose, I don't think Chelsea will beat Arsenal even though the match will happen on Chelsea's home.
it is not impossible that Chelsea can hold Arsenal. even Southampton can also hold Arsenal to a draw.
I think the odds of this match are 50:50. Chelsea may have had some bad results in their last game. but Chelsea won't lose easily at home. I think a draw is quite possible in this match. or a small win by 1 goal for one of the teams. but in terms of the game, I believe Arsenal can dominate more.