#3 Marcelo Brozovic (Inter Milan)

Inter Milan defensive midfielder Marcelo Brozovic is 29 years old. As a result, he is not a long-term solution to Manchester United's midfield problems. However, he is a top quality midfielder and can be a great stopgap signing for the Red Devils.
The Croatian international's contributions to the Nerazzurri's cause over the past few seasons are undeniable. He played a crucial role in their Serie A triumph last season. Brozovic is an all-action midfielder who can play anywhere across midfield.
He has slotted into various positions with ease and has consistently dispensed his duties with aplomb. Inter Milan are reportedly keen to extend his contract but as things stand, Brozovic joining Manchester United in the summer is still a possibility.
Brozovic could be a great short-term asset for the Red Devils as they figure out their next moves since there are quite a few other key areas they need to strengthen as well.
#2 Franck Kessie (AC Milan)

Manchester United's best bet in midfield right now is the double pivot of Fred and Scott McTominay. Although they have their qualities, the Red Devils desperately need a strong presence at the heart of midfield.
Signing a holding midfielder is a priority for them this summer and they shouldn't look any further than Franck Kessie.
The AC Milan midfielder will have plenty of options to choose from this summer. He has done a great job for the Serie A giants since joining the club in 2017. In 207 appearances across all competitions for the Rossoneri, the 25-year-old has scored 36 goals and provided 16 assists.
In addition to being a combative midfielder, Kessie is difficult to shrug off the ball thanks to his ball-retention abilities and upper body strength. He is also very calm and composed on the ball, which is something that cannot be said of Fred or McTominay.
Kessie is also an excellent passer of the ball and loves to bomb forward to join the attack and score goals. If Manchester United are serious about restoring their lost glory, this one is a no-brainer. They have to sign Kessie.
#1 Antonio Rudiger (Chelsea)

Harry Maguire has been so consistently poor this season that it is difficult to chalk the deterioration in his levels up to a dip in form. Manchester United need to partner Raphael Varane up with someone who is more sure-footed and aggressive at the back.
Chelsea centre-back Antonio Rudiger is set to become a free agent this summer. The German international is one of the best defenders in the world right now. He has earned a lot of praise for his tenacity, work-rate and mentality. Rudiger is a warrior-like presence at the back and he could be a great partner for Varane.
He is well-settled in the Premier League and has a penchant for turning in excellent performances in clutch situations. It's hard to even imagine this one going wrong.
If Rudiger does not extend his contract with Chelsea before the end of the season, Manchester United should leave no stone unturned in trying to secure his services.