Louis van Gaal is set to spend big again this summer with four targets suggested in reports.
The Old Trafford outlet spent £150 million last summer but still only managed to finish fourth in the league. Names such as Angel Di Maria, Ander Herrera, Daley Blind and Radamel Falcao all came in but could not aid United in a push for a title.
Van Gaal will be hoping his side have a better league campaign this time around along with a return to the Champions League.
In order to challenge the likes of Chelsea and Manchester City next season, van Gaal's side will need to significantly improve defensively, across midfield and up front.
While United realistically cannot upgrade their goalkeeper, the club may still be on the lookout for a replacement for David de Gea, who is closely being linked with a move to Real Madrid, as per the Guardian.
Ajax won't want to see Cillessen leave this early but it will be difficult to keep him if United come knocking, especially when van Gaal already has a good working relationship with the goalkeeper, giving him a first-choice role for the Netherlands at the World Cup last year.
It's not just between the sticks where United need to worry. A lot of goals were conceded last season due to inexperienced defending, so the club is likely to have an array of centre-backs on their shopping list.
Sergio Ramos has recently emerged as a target, as per ESPN, following contract talks with Real Madrid allegedly breaking down. It looks like he may be entertaining the idea in order to get a bigger and better contract to stay at the Bernabeu.
The centre-backs currently available to van Gaal at United are Chris Smalling, Phil Jones, Marcos Rojo, Jonny Evans, Paddy McNair and Tyler Blackett. Only Smalling looked solid enough last season to be considered a regular if the club are looking to push forward.
More commonly known as a priority for van Gaal this summer is a midfielder recruitment. Bayern Munich's Bastian Schweinsteiger would certainly strengthen United's light midfield and give the manager more options to select from.
The 30-year-old would arrive as a World Cup, Champions League and Bundesliga winner bringing an array of experience to a side that has forgotten how to win.
Up front, van Gaal has set his sights on Karim Benzema, as per ESPN, after a season of Robin van Persie and Radamel Falcao failing to take their chances which would eventually put needless pressure on their team-mates.
Until van Gaal put Wayne Rooney up top alone there was no real consistent goalscorer apart from input from midfield. The England captain has been seen a player good enough to play an array of positions, so it would be understandable if the manager wanted to cement another reliable finisher.