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The heated rivalry between Boca Juniors and River Plate has been voted as the biggest rivalry in world football, with over 53,000 fans voting to decide.
Everyone loves a fierce rivalry in football and with the Milan Derby taking place on Saturday night we took the opportunity to find out which was football's biggest rivalry.
Fans voted between 16 rivalries as Dortmund vs Schalke, Newcastle vs Sunderland, Olympiakos vs Panathinaikos and Boca vs River were in the first last 16 tie:
Group B saw Arsenal vs Spurs, Inter vs AC, Aston Villa vs Birmingham and Ajax vs Feyenoord duke it out:
Group C had the Clasico, West Ham vs Millwall, Roma vs Lazio and Galatasaray vs Fenerbahçe:
And last but not least United vs Liverpool, the Old Firm, Red Star vs Partizan and Brazil's Flu Fla rivalry made up the final last 16 group:
Boca and River along with the north London sides made it into the final from their 'semi' whilst the passionate Turkish fans made sure they beat the Old Firm teams, as both made it through to the final.
It was certainly a surprise to see the Premier League rivalry get to the final considering most would have thought no one outside of London would really care about it.
But the London sides could only finish fourth in the final, with the Old Firm finishing in third just behind Istanbul's fiery rivalry and Boca and River topped it all.
Last year the two Buenos Aires sides faced each other over two legs in the final of South America's Copa Libertadores.
The first leg finished 2-2 at Boca's La Bombonera stadium but the second leg had to be abandoned ahead of kick off because of crowd trouble outside of River's stadium.
The second game had to be moved to a neutral venue, with Real Madrid's Bernabeu hosting the first Copa Libertadores final outside of South America.
River won 3-1 in the Spanish capital to take the title.
What's your favourite rivalry?