7 Most Astonishing Secret Football Contract Clauses Ever

2. Atletico's Madrid's Golden Ticket Transfer Clause

Atletico Madrid hit the jackpot with the sale of Argentinian striker Sergio Aguero, which included a number of money making add-on clauses. While the sale of the prolific striker caused ripples of discontent among the passionate Madrid club's fanbase, Atletico certainly ensured they got their money's worth in more ways than one.

City are of course well known for their financial clout, having the backing of Sheikh Mansour of the Qatari royal family. Money appears to be no object at the Etihad Stadium and Aguero's secret contract clauses certainly confirm that.

The Spanish club receives a whopping €250,000 for every 15 goals scored by the player and another €250,000 for every 25 games in which he plays. In addition to those sums, a further payment of €1million is payable each time City wins the Premier League title.