Rio Ferdinand believes United should be looking for three or four further additions in the squad.
The former United defender believes that Ole Gunnar Solskjaer needs to bolster up three or four positions in order to get back to the winning ways like old times under Sir Alex Ferguson.
The addition of Donny Van de Beek from Ajax would already strengthen their already strong midfield department.
Jadon Sancho has been the top summer target for Manchester United in the last few months but the Red Devils have failed to make progress with Borussia Dortmund.
“I would say definitely after Van de Beek they need probably – if they’re going to really compete – three or four. Players that can go in and actually affect the first team, the first XI,” Ferdinand told BBC Radio 5 Live.
“And Reguilon we’re talking about, the lad at Sevilla who’s from Real Madrid, he was voted the best left-back in La Liga so really good credentials.
“Luke Shaw I think is unfortunate in terms of his injuries. He’s played games but then he hasn’t been able to sustain a full season without any injuries, which is disappointing.
“But listen, if I was looking at it and looking at the team, in the forward areas I think one or two additions.
“One definitely, maybe two, are needed that can come in and affect that first team and push people, if not start.
“And then I think a centre-back. That area, for me, is where there’s a lack of real, genuine pace and I think the best teams around at the moment have a player in one of the two players that play [at centre-back] in a four that has genuine pace normally.