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Jan Blachowicz could not have known his gravest threat would come from below.
The undisputed Ultimate Fighting Championship light heavyweight titleholder will defend his crown against reigning middleweight champion Israel Adesanya in the UFC 259 main event this Saturday at the UFC Apex in Las Vegas. Blachowicz, 38, owns a 10-5 record inside the Octagon and enters his first title defense on the strength of a four-fight winning streak.