Man United will need 'open-heart surgery' under Ten Hag, said Rangnick

United were thrashed 4-0 by Liverpool in midweek and they also face an uphill struggle to reach the Champions League next season.

"One of the very few good things, is that it's crystal clear. You don't even need glasses to analyse and to see where the problems are," said 63-year-old Rangnick.

"So, now it's only about how do we solve them? For me, it's clear it's not enough to do some little, minor amendments, some little issues here and there, some minor cosmetic things. "No, in medicine you would see this is an operation at the open heart, so there are more things to be changed than some little things here and some minor things there, and this is the good thing".

Ajax manager Ten Hag will face a huge task next season to revive United after a fifth consecutive trophyless campaign.