I'm more than confident that a win over Arsenal alone won't get the team back on track, or as many believe - they can fight for any top again. Yes, beating a team like that is a morale booster, but it's not enough and Chelsea still have too much work to do, I think top 5 is even close to happening this season
Winning Arsenal would be a very big boost to the confidence level of Chelsea players but i think they might begin to suffer again after playing the next two matches cause they'll face Tottenham then Manchester City then Newcastle and Manchester United before facing Everton, amongst all the stated names the clubs I know they could survive against is Everton and maybe Manchester due to their poor performance.
The schedule ahead is very tough and I wonder how they'll be able to get past those three teams before Manchester United, if they lose against all three it might even make them drop form when they face Manchester United cause their morale could become weak after suffering three loses, however there coach Pouchettino request that Chelsea fans trust the process, I hope he trust In his team to win all tough fixtures ahead.