Tuivasa didn't take his first fights in the UFC seriously.
After his 3rd straight loss to Sergey Spivak, Tuivasa realized he needed to make a change and trained at American Kickboxing Academy in california. Apparently making that change and seeing many talented fighters in the gym everyday was what he needed to get motivated.
Since making that change, Tuivasa has had 4 straight wins by KO.
Derrick Lewis said he choked under the pressure of fighting in front of his texas home crowd, back when he fought Ciryl Gane. Lewis has also struggled with a back injury over the years, leading to inconsistent performances.
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Robert Whittaker showed many visible improvements in his game, back when he fought Kelvin Gastelum. I think this fight between Adesanya and Whittaker will be closer and more competitive than their 1st meeting.