JACKSONVILLE, Fla. – A lot has changed for “The Korean Zombie” between his two stints as the next man up. It’ll be nearly a decade between title challenges for Chan Sung Jung when he steps into the UFC 273 main event Saturday opposite Alexander Volkanovski. The first championship opportunity was at UFC 163 in August 2013. Against then-champion Jose Aldo, Jung lost by TKO due to a shoulder injury in Round 4. Since then, Jung (17-6 MMA, 7-3 UFC ) has experienced ups and downs – with the ups outweighing the downs in terms of wins and losses
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