Dimitar Berbatov has warned Ole Gunnar Solskjaer must rotate his squad to be successful in the Europa League.

United are looking forward to Sunday's semi-final with Sevilla in Cologne.

And Berbatov hopes Solskjaer can avoid his players getting fatigue by rotating his selections.

"The majority of players want to play every match, particularly when things are going well," the Bulgarian wrote for Betfair.

"But it's important to speak to players and see how they are feeling, and as a manager you need to be ready to rest a player even when that player says he wants to play but is fatigued or carrying a knock. If you meet a team that is as good as you and your players are suffering fatigue, you are going to be in trouble.

"It's interesting to see Ole rely on this 11, and it shows these are the main guys, with some exceptional talent. Other players are getting chances, but there is a clear hierarchy now between starters and subs.

"This isn't permanent and shouldn't be. Take Scott McTominay, he is on the bench now, so he needs to work very hard to get into the starting 11. He needs to stay after training, show he's willing to put in the extra effort. Ole will see and appreciate this. Scott can do it because he is a very talented boy."

Berbatov also backed United to get a result by any means possible against Sevila on Sunday night, as Solskjaer looks for his first silverware since taking the Old Trafford hotseat.

The Bulgarian added: "At this stage of the competition, winning is all that matters. They have to win two games and it doesn't matter how they play if they win those. Tiredness, fatigue, stress - these are all major factors, so results are more important than style in this moment. I think playing these games as only one leg makes sense to ensure the competition gets finished on time.

It's a necessity really with how the world is right now. Both ways have merit. With two games, as a fan you get more to watch! As a player, it can be tough - you beat the team 1-0 or 2-0, then you must play again!

"That can be annoying. With one game, you need to be tuned in, no mistakes. Two games is probably the way it will go when things come back to normal.

"Sevilla and Inter are huge dangers to United. Inter were excellent against my old team Leverkusen on Monday. United should scout all these teams as best they can, obviously Sevilla have an amazing record in this competition. Again, as I said, all that matters now is winning these last two games for United."