Chael Sonnen versus Wanderlei Silva may just be the biggest rivalry in UFC history. Originally planned as a co-main event for UFC 173, the fight has been moved to headline a card on May 31st in Brazil.

This rivalry has been mounting since 2011, when Wanderlei Silva warned Chael Sonnen not to talk badly about Brazilians following repeated jibes at South American opponents.

Since that time Sonnen and Silva have been verbally attacking each other whenever they have the chance.

Silva and Sonnen almost broke out into a fight when Wanderlei approached Chael at the start of filming the Ultimate Fighter in Brazil and although things got heated, nothing physical happened.

They both star as opposing coaches in the upcoming season of The Ultimate Fighter, which will premiere on March 9th and will be available on UFC: Fight Pass.

Sonnen will always be remembered as the guy that almost beat Anderson Silva, regardless of future efforts.

The self-proclaimed 'American Gangster' talks a lot, and self promotes, but there is no denying that he lives up to all the talk when he's in the Octagon at his best.

Wanderlei meanwhile was once an amazing force in the MMA world, having a great stretch of wins, with very few losses from 1996 to 2006.

Since that time his fighting ability has diminished, plus he has a very bad record in the UFC, winning only 5 of his 12 fights in UFC events.

Silva hasn't fought in a while but won his last fight against Brian Stann in March of 2013 following a brutal back-and-forth war.

It appears that Sonnen has the advantage in this fight but you can never underestimate Wanderlei. The fight will be in Wanderlei's home country of Brazil, where Chael is hated. This will be the ultimate grudge match.

Write for GiveMeSport! Sign-up to the GMS Writing Academy here:

DISCLAIMER: This article has been written by a member of the GiveMeSport Writing Academy and does not represent the views of or SportsNewMedia. The views and opinions expressed are solely that of the author credited at the top of this article. and SportsNewMedia do not take any responsibility for the content of its contributors.

Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: