Ex-Liverpool player Jamie Carragher has said that Manchester United's problems lie in attack, as Radamel Falcao and Robin van Persie's relationship continues to struggle.

Neither player scored as the Red Devils drew 1-1 at West Ham United yesterday, leading Carragher to suggest that United won't sign Falcao on a permanent basis this summer.

He told Sky Sports News: "I don't see Falcao staying, it's something they have to address. I can't believe [James] Wilson didn't come on at some stage of the game. Falcao and Van Persie lack movement and I don't think this is a partnership that's working.

"Everyone talks about United and that they need a centre-back, they have one of the best defensive records in the league, although [David] De Gea is part of that, but that's the reason you pay him. The problems are at the other end of the pitch."

United have scored 40 league goals in 24 games so far this season.