"It's going to be survival of the fittest or survival of the best," Solskjaer told ESPN in a news conference ahead of the Premier League clash with West Ham on Saturday. "That's how ruthless we have to be.
"We need players here who are going to be able to take us forward. That means culture in the dressing room, what we do every single day here to make us challenge again.
"Liverpool and City are too far head at the moment for what we like. We played against a Barcelona team that sets the standard in European football. We're under no illusion it's going to be hard work and there will be some tough decisions made by me, Mick [Mike Phelan] and the club."
Some of the names that are expected to leave Old Trafford in the summer include Alexis Sanchez, Matteo Darmian, Marcos Rojo and Eric Bailly.
⬇️ Predict 6 EPL football scores with Futaa6 and you could win the $10,000 Jackpot, best of all it’s completely free to play every week in the Futaa Android App Download it now to play!