#3 Lionel Messi (Barcelona) - €700 Million
Probably the greatest player to go down in history, and after watching helplessly as his teammate's release clause was triggered, Barcelona's first priority was to make Messi's release clause unpayable by any team in the world.
Source: metro.co.uk/2017/11/25/lionel-messi-finally-ends-speculation-over-his-future-by-signing-new-barcelona-contract-7107713
After making fans wait anxiously as he entered the final year of his contract, the Argentine finally signed an extension at the end of 2017.
Messi has been a one club man and made his debut way back in 2004 and has since gone on to win every possible trophy with the club, including two historic trebles.
Known for his exquisite ball controlling ability, finishing and dribbling, Messi is a perfect example and role model for other aspiring wingers, and footballers in general. Now in the prime of his career, everyone is anxious about what more he can achieve.