I'll agree the race for the fourth spot has just caught pace, had Manchester United yet been under Mourinho I'm sure all three matches would have ended in defeat. There're three people responsible for Manchester United revival Ole Solskjaer, Mike Phelan and Paul Pogba these three have united to lift the club up. I feel if Tottenham also suffers losses along with Chelsea it'll get really interesting.
I expected that Tottenham will be competitive this year in the chase of the championship title. They seem inadequate and I hope that Chelsea is going to win against them. As Far as Man.Utd is concerned, it is noticeable that the players didn't want Mourinho to seat on the bench. This was probably due to mismanagement that he did (we saw that many times in different clubs that he was in charge of).
I can't see a fight for the 4th place. I believe that Man. Utd can't compete. Chelsea or Tottenham will be at 3rd and 4th places at the end of the season.