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The 33-year-old Uruguayan striker became a free agent in June and was heavily linked with moves to Benfica and Atletico Madrid.
But Cavani would finally complete a sensational deadline-day move to United and will now follow in the same footsteps as David Beckham and Eric Cantona in wearing the No 7 shirt.
Planet Football has now ranked every single one of United's No 7s in the Premier League era following the arrival of the former Paris Saint-Germain star.
Juventus superstar Cristiano Ronaldo came out on top of the pile, with the publication saying he had 'some huge boots to fill when he inherited the shirt from Beckham in 2003.'
The 35-year-old Portuguese forward lifted one of his five Ballon d'Ors during his incredible six years at Old Trafford.
Ronaldo won three Premier League titles, an FA Cup, two League Cups and the Champions League with United.
Planet Football pointed out that the ex-United star once again followed in Beckham's legendary footsteps when he completed his stunning £80m move to Real Madrid in 2009.
Beckham came third behind fellow legend Cantona, who was the first United player to be assigned the United No 7 shirt in the Premier League era.
According to Planet Football, the 54-year-old Frenchman 'left an incredible legacy for others to follow.'
Posted below are Planet Football's rankings for every United No 7 in the Premier League era.
8. Alexis Sanchez
7. Memphis Depay
6. Angel Di Maria
5. Antonio Valencia
4. Michael Owen
3. David Beckham
2. Eric Cantona
1. Cristiano Ronaldo
Featured Image Credit: Manchester United/PA
Topics: Football News, Angel Di Maria, Football, Manchester United, Memphis Depay, David Beckham, Alexis Sanchez, red devils, Premier League, Michael Owen, Eric Cantona, Antonio Valencia, Cristiano Ronaldo
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