Gary Neville fears trouble is brewing at as and Dean Henderson compete to be first choice goalkeeper.
Henderson has returned from an excellent season on loan at at a time when De Gea’s position looks vulnerable after a succession of high-profile errors.
It leaves manager Ole Gunnar Solskjaer with a dilemma ahead of the new season and the Manchester United legend doesn’t believe the competition is a positive thing.
The Old Trafford legend told Sky Sports: ‘The idea that Dean Henderson would come into Manchester United and replace David de Gea as No 1 goalkeeper straight away… it won’t happen, I can guarantee it won’t happen.
‘This has got “problem” written all over it. The one area of the pitch where you need consistency and stability is your goalkeeper.
‘You need to know who your No 1 is, you cannot be flip-flopping. It just does not work; I’ve never seen it work at any club or at international level.
‘Where there is a decision to be made about two goalkeepers you have to pick your No 1, go with him and stick with him, even if there is a mistake. Continue reading