Manchester United legend Denis Irwin backs their move for Everton fullback Seamus Coleman.
Coleman was linked with United over the weekend.
Irwin told the Sunday World: "I think for him to be potentially world-class - and this is no disrespect to Everton – he probably has to move to a club that plays regularly in Europe.
“That's no disrespect to him either. That's the next stage of his progression. He's gone across from Sligo, went on loan to Blackpool, he's got better with Everton. It's been progression all the way.
“They play a very attacking style at Everton, sometimes too attacking, which suits him because he is fantastic going forward.
“We've even seen him play on the right wing at times. If he keeps going like that, he's going to be linked with teams in the top echelons of football.
“He's got a bit of experience under his belt now, he's at a good age and he's at a good club for learning. 25/26 is when you start to get comfortable as a footballer.
"Most things have happened to you on a football field and you can deal with them. They're probably the best years of your life because you've still got your fitness as well."