Despite making a very strong start to the season, Louis van Gaal is still not entirely happy with his squad.
The Red Devils had struggled since Sir Alex Ferguson's retirement in 2013, but have made a very strong start to the campaign. Their last-gasp victory over Watford on Saturday has left the Red Devils second in the Premier League, while they currently top their Champions League group with two games to go.
Nevertheless, van Gaal admitted that he is not entirely happy with the squad at his disposal.
"I said on September 1 that I think we have a better balance in our selection and I suspected we would do better than last year," he explained.
"But still I need more balance in my selection and I have already said that we need fast wingers to get us to where we have to be," the Dutchman added.
While it has been mostly impossible to criticise United this season based on their results, their style of play has been somewhat underwhelming.
Having previously boasted wingers such as Ryan Giggs, David Beckham and Cristiano Ronaldo, it is a lack of similar players in the current squad that appears to be the main reason that the Old Trafford outfit are incapable of replicating the fast-paced, ambitious football that made them the dominant force for much of the first two decades of the Premier League era.
A lack of options in this area of the pitch has seemingly contributed to United adopting a much more methodical approach and that has often led to the side grinding out results - such as the victory at Vicarage Road at the weekend - rather than tearing teams apart.
Adding some wingers with the ability to use their blistering pace to get down the line, and subsequently craft a delicious cross may be the final piece in the jigsaw that sends United back to the summit of the game.