#10 Cristiano Ronaldo – 2009

Popping up on this list a second time and for good reason is Cristiano Ronaldo. After winning three league titles and the Champions League with Manchester United, young Ronaldo was sold for the record-breaking transfer fee of 94 million euros to Real Madrid.
Despite the transaction occurring nearly a decade ago, this fee is still the 8th most expensive transfer fee in the world. We all know what happened next: 450 goals, four Champions League titles, and four Ballon d’Or awards. After the transfer, Ronaldo solidified his place as one of the greatest football players of all time. Without Ronaldo, it’s likely that Madrid couldn’t have competed with one of the best Barcelona teams of all time.