John Terry has shared a video of Diego Costa flooring Chelsea physio Billy 'Rocky' McCulloch back in 2014 and it makes for incredible viewing.
Costa joined the Blues from Atletico Madrid in 2014 and was known for his volatile temper on the pitch.
Given that temper, it should come as no surprise the Spain international had a 'boxing match' in training - and won.
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Terry has shared the video from Chelsea's pre-season tour and Costa showcased some breathtaking moves.
The tweet is captioned: "@diegocosta Vs Billy ( AKA ) Rocky Pre season 2014/15 After this I knew we would win the league. What a Legend. I'm crying watching this."
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Both men size the other up to start with before McCulloch reacted to Costa's taunting.
Costa backed away from his foe before levelling him with a few shots which McCulloch attempted to get up from.
'Rocky' was spent however and after getting up once again, he went to the ground.
The exchange was all in good fun and both men embraced at the end as the rest of the squad gave a round of applause.
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Former Chelsea captain Terry was asked about his thoughts on Costa in the replies and 'JT' was full of love.
He said: "Genuinely a top guy. I loved him because he gave everything, every single day for our club. He cared and was an unbelievable player."
During the 33-year-old's time in England, he won two Premier League titles and the Carabao Cup and had good fun doing so.
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His power and physical presence gave Chelsea a perfect focal point for the rest of the team to play off.
Costa was a stone-cold killer in front of goal, bagging 20 goals in his first season in the English top flight.
He also scored the second in League Cup victory over Spurs at Wembley, further cementing his place as a player for the clutch moments.
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Costa would then fire Chelsea to another league title two years later when he hit 21 goals for Antonio Conte's 2016/17 title winners before eventually falling out with the Italian.
He returned to the Atletico in 2018 before eventually joining Atletico Mineiro.
Featured Image Credit: John Terry/TwitterTopics: John Terry, Chelsea, Football, Premier League, England, Diego Costa