Manchester United legend Paul Scholes believes a dominating centre-back is needed to challenge for the league.
The Red Devils have the most goals of any team in the Premier League.
They picked up a 3-1 win over Newcastle United at the weekend. However, Scholes believes they do not defend well enough to win the biggest trophies in the game.
"I think they're missing a real, dominant centre-back," Scholes told BT Sport.
"If you look back at history at the teams who win leagues, they have real leaders in their back four.
"I think Maguire possibly could be but I think they need someone with him who can be really dominant in that position, really commanding, can bully a centre forward, can demand from the rest of the squad around him, on and off the pitch as well.
"I don't think they're far off at all.
"I think the attacking play, the midfield play, Paul Pogba looks a brilliant player, the play we hoped we bought. Fred and McTominay are doing well, McTominay especially.
"The attacking players are a real threat. Greenwood is coming of age, he's still a young player but the more games he plays the more star quality you'll see, this lad could be a superstar.
"You've got Rashford, you've got Martial, okay he's struggling for confidence but that lad's got real ability.
"You've got the experience of Cavani, there's goals in the team, we've not even spoke about Fernandes. There's real goals in the team.
"I think a real dominant centre half with authority could tip United to that next level."