Manchester United striker Zlatan Ibrahimovic has become virtually undroppable this season according to manager Jose Mourinho.

The 35-year-old has found the net 14 times in all competitions for United this season after he joined from Paris St Germain on a free transfer in the summer.

Ibrahimovic has also featured in more games than any of United's other strikers this season having appeared in 24 of their 26 matches.

The former Sweden international will start up front in the Red Devils' Premier League clash with West Bromwich Albion, although Mourinho admits he will have to give him a rest at some point.

"It is almost impossible to leave him out? Yes, it is," Mourinho said.

"As a striker he is one of the impossible positions where you cannot hide. He is phenomenal and play again tomorrow and then one week to rest.

"I am not surprised at all. I knew from the physical point of view he could resist but obviously he cannot play 60 matches. I must give him a rest.

"I must leave hum out a game. He was suspended against Arsenal. So that game he did not play,.

"In some matches in the Europa League he was on the bench, also against Northampton. So now and again I will find him a way to give him a rest.

"But as our target striker we can see he is the only one. And the way we normally play we need him."

Manchester United injury news Show all 5 1 /5 Manchester United injury news Manchester United injury news Ander Herrera (hamstring) Return date not yet known. Getty Images Manchester United injury news Phil Jones (ankle) Return date not yet known. Manchester United injury news Michael Carrick (ankle) Could play this weekend. Manchester United injury news Antonio Valencia (ankle/ foot) Out for a lengthy period, possibly February. Getty Manchester United injury news Luke Shaw (broken leg) Expected to be out until at least April.

The Red Devils have been boosted by the return of defender Chris Smalling for the trip to The Hawthorns, but fellow centre-back Eric Bailly will miss out with the knee injury he picked up against Crystal Palace.

"I don't know how long with Eric, but no surgery," Mourinho said.

"By the movement on the pitch we thought meniscus but no. It's a question to see the evolution. Hopefully we have him for these last two matches at home in 2017."

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Left-back Luke Shaw (groin) and midfielder Henrikh Mkhitaryan (ankle) are not yet considered fit enough to return.

West Brom manager Tony Pulis is currently the highest placed British manager in the Premier League with his side seventh, four points behind United in sixth.

Bailly suffered a new knee injury during United's win over Crystal Palace (Getty)

And Mourinho believes perhaps British managers do not get the recognition they deserve for their achievements.

"In English football there are different kinds of profiles," added the Portuguese.

"If you manage big teams like we did. Real Madrid, Inter, Barca. Bayern, Juventus, Dortmund. If you manage these big teams obviously the targets are impossible for people like Tony Pulis, Alan Pardew, Mark Hughes, David Moyes.

"And Tony (Pulis) got trophies everywhere in every club. He was not relegated with Stoke, it's a trophy. He was not relegated with West Brom, it's another trophy. Not relegated with Palace it's another trophy. And so on, and so on.

"So he has lots of trophies. By trophies I mean reach the target and he did that. Like some, never relegated, that is a big trophy.