#4 Matthijs de Ligt (Ajax to Juventus, 2019)
Transfer fee: £67.8 million
If you've seen Matthijs de Ligt play for Ajax or heard him speak, you would be thoroughly surprised that he's not even turned 20 years old.
The Dutch footballer had been the Ajax captain at 19 years of age and led his team to the Eredivisie title in 2018-19. There was no surprise that all the big teams were vying for his signature, at the earliest.
In the end, Juventus managed to sign him for an insane £67.8m deal. This deal will keep the young star at Turin for the next five years.
There was a massive tug-of-war between PSG and Juventus which was eventually won by the Italian giants.
Matthijs de Ligt has joined Juventus at a crucial period where they are heavily investing in players.