Signing a football contract is sometimes not as simple as agreeing to a wage, as the likes of Luis Suarez and Mario Balotelli will tell you. Here are 10 of the most bizarre contract clauses of all time, featuring some of football's biggest names, including Cristiano Ronaldo!

Click through the gallery above to see 10 big names and the crazy clauses that were inserted into their contracts, as per various reports!

Many footballers have had strange clauses included in their contracts, sometimes requested by the players themselves and other times by the clubs.

In 2014, upon signing for Spanish giants FC Barcelona, Suarez was reportedly made to agree to a "no biting" clause following three controversial biting incidents. The Uruguayan first bit an opponent during his time in the Eredivisie, then while playing for Liverpool, and then at the 2014 FIFA World Cup.

It is not known what exactly would happen to Suarez if he were to breach the clause in his Blaugrana deal, and the LaLiga champions will hope things stay that way.

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At the Reds, ill-disciplined Balotelli had a clause in his contract that encouraged him to behave, while Arsenal icon Dennis Bergkamp was believed to have had a "no flying" clause inserted into his deal with the Gunners.

It is well known that the Dutchman has a fear of flying, and while it may not have always been easy for the club to work around his phobia, Bergkamp still managed to represent the London club for 11 years.

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Ronaldo's is one of the more normal clauses in our list, with the Portuguese becoming the first player in history to have a €1 billion (R20 billion) release clause after he signed an extension with Real Madrid in 2015. Many other strange clauses feature – click through the gallery above to see them!

Which of these clauses is the most bizarre? Let us know in the comments section below.