LAS VEGAS – Dustin Poirier isn’t one of the fighters questioning UFC lightweight champion Charles Oliveira ’s heart. Top contenders Michael Chandler and Justin Gaethje have accused Oliveira of giving up in fights in the past, but Poirier (28-6 MMA, 20-5 UFC) disagrees – or at least no longer thinks it’s the case. Oliveira (31-8 MMA, 19-8 UFC) was tested in his vacant lightweight title fight against Chandler at UFC 262, but after getting dropped and badly hurt at the end of Round 1, he rebounded in emphatic fashion by putting Chandler away just 19 seconds into Round 2. “I’ve seen Charles in a lot of fights,” Poirier told MMA Junkie and other reporters on the UFC Hall of Fame induction red carpet Thursday in Las Vegas. “He’s been in a lot of fights at a high level, so I’ve seen him kind of fold in fights before. But I’ve also seen him rise to the occasion and show up in adversity
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