Their next game is against Arsenal. I do believe Arsenal has a better team and better overal quality. If Utd can beat Arsenal with effective football then they will have a decent chance to win the BPL. Chelsea is pure trash at the moment. If they don't get over these bad results, they will probably have another bad weekend next week against Southampton. We'll see.
I don't think arsenal are that strong a team really but neither are United. I was expecting arsenal to struggle against Leicester but they surprised. None of the big teams have impressed this season really. I'd prefer an underdog like West Ham, Palace or Leicester to do well personally.