Manchester United sit 11 points adrift of league leaders Manchester City and are tipped to invest in the squad next month.

Mourinho only brought in three players during the summer despite requesting four new recruits.

A number of players have been linked, while United may also trim the squad.

The likes of Marouane Fellaini, Matteo Darmian and Luke Shaw have all been linked with moves away.

And Mourinho says he will only buy if he can sell at the same time.

Asked in particular about Fellaini, who has just six months left on his contract, Mourinho said: “I’ve nothing to say in relation to Fellaini.

“I’m not a big defender of the January market but there are players and situations that sometimes you have the chance to do and you shouldn't lose the chance.

"I don't like the January market just to buy.

“But if you can buy in January a player that you would buy in June or July and you have the chance to get him a few months before then great, but just that."

United have been linked with a number of players, including Tottenham’s Danny Rose and Antoine Griezmann of Atletico Madrid.

Rose appears the more likely acquisition if left-back Shaw is shifted out, with Newcastle supposedly interested.

United face West from on Sunday (2.15pm) as they look to make it two wins form two after beating Bournemouth in midweek.

Mourinho said of the game: "They got so many points with (former manager) Tony (Pulis) in the big matches.

“I think Tony assembled a very good squad, lots of players of experience, physical players adapted to the Premier League with know-how, lots of experience.

"So the squad is good, the players are good, the stadium is enthusiastic, the match is difficult."