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Manchester United have spent close to a staggering £1billion on transfers since Sir Alex Ferguson left the club at the end of the 2012-13 Premier League season.
However, it is no secret that the Red Devils have not exactly been a bastion of stability.
Despite splashing out huge transfer fees, United have found themselves slowly slipping out of contention for titles.
They sold a bunch as well, but have not come anywhere near challenging for the title.
Here are five players who should never have left the club.
Romelu Lukaku is not included here because of his desire to leave United.
Ander Herrera was excellent in the transition phases, winning the ball and at breaking up oppositions attacks. Now, United are clearly missing someone with that dynamism. His absence was combined by the fact he has not been replaced.