Former United midfielder Paul Scholes is worried that the club he gave his career to could go years without winning another trophy.
Since his retirement from professional football in 2013 the talismanic midfield player has gone from a shy footballer keen to stay out of the public eye, to an opinionated pundit unafraid of airing his views on all matters in the game.
And this time Scholes has had his say on the uncertain future surrounding his old club. After a disastrous performance in the Premier League last season that saw United finish seventh and David Moyes lose his job, many predicted that this would be the start of the decline for England's most successful football club.
Scholes, who was a member of the 'Class of 92', is worried that such a decline is a possibility and feels they could go on a trophyless barren spell, just like arch-rivals Liverpool did in the 1990s.
He wrote in his column for The Independent: "I am scared for United. Genuinely scared they could go into the wilderness in the same way Liverpool did in the 1990s."
Liverpool were a powerhouse in the old First Division pre-1990 and won 18 titles in total, but since then they haven't been able to add to their haul of league titles. The only trophies the Reds did win during that 10 year period between 1990-2000 were the FA Cup in 1992 and League Cup in 1995.
United can probably avoid such a scenario so long as they make some significant investment during the remaining 10 days of the summer transfer window.
So far the club have spent approximately £75 million on Ander Herrera, Luka Shaw and Marcos Rojo, but despite this executive vice-chairman Ed Woodward has been slammed by supporters and the media for failing to bring in the marquee players that United need to rebuild the squad.
Scholes, who also featured 66-times for England, says Louis van Gaal needs at least five more players to render the situation at Old Trafford.
"What do they need? Five players. Five proper players who can hit the ground running and turn round a situation that looks desperate," he continued.
"Let me be clear: I am sick of having to criticise the club which I gave my life to as a footballer. But United need to arrest their decline."