Former Liverpool defender Jamie Carragher says it is not possible for Manchester United to win the title this season.
Despite looking rejuvenated as of late, the Red Devils have lost too much ground on leaders Chelsea, the 2005 Champions League winner argues.
Speaking to SkySports, Carragher said: "I would expect them to get stronger as the season goes on. That’s quite a thought when you consider that, despite people saying they have had a poor start, they are fourth in the table and above Arsenal, Liverpool and Everton.
"Still, I can’t quite agree with Rafael and say they are capable of winning the title this season as, for me, Chelsea, the standout team so far, and Man City are the only realistic challengers to top the table."
Brazilian defender Rafael had said earlier this week he still sees the title as a realistic possibility.
"If we understand the way we are playing like we are doing, the results come and everything starts to run smoothly, we certainly have a chance of winning the title."
United sit fourth, eight points behind Chelsea. That could be 11 points by time they face West Brom on Monday night, with Chelsea travelling to Crystal Palace on Saturday.
The following weekend, there is a huge encounter as United host Chelsea at Old Trafford. A win against the Blues could be huge and reduce the gap to as little as five points, or even less if Mourinho's side slip up at Palace this weekend as they did last season.
Perhaps then, talk of a title challenge will not be so easily dismissed.