Adamek came forward behind a jab in the opening round. Chambers used movement and made Adamek miss often, while slipping in a few shots of his own. Chambers informed his corner following the first round he had sustained a muscle injury to his left arm. He often switched between orthodox and southpaw stances and threw sparingly with the left hand throughout. Chambers continued to slip the majority of Adamek's shots in Round 2. In Round 3, Adamek worked less with the jab and had some success with combinations. Chambers landed a couple of decent looping right hands. Adamek out landed Chambers in Rounds 5 and 6 as Chambers' offense waned and he fought strictly with his right hand. Chambers likely landed the cleaner shots in Round 7 as he had success with the right hand over Adamek's jab. A pair of right hands bloodied the nose of Adamek in the first half of Round 8, before Adamek came on with the higher output to close the round. Round 9 was largely controlled by Adamek as he pressed the action and greatly outworked Chambers. Chambers was still able to make Adamek miss, but likely did not return enough punches to earn the round. Chambers had an improved tenth round by landing with single right hands over Adamek's jab. Adamek, who appeared to take the round off, did much less than in the ninth. He turned back up his aggression in Rounds 11 and 12 as Chambers flipped out his right hand but was outworked. The decision was controversial. Chambers appeared to have done enough to win the bout. The fact Chambers was only able to use his right hand due to the left arm injury was a major factor which influenced the scoring by the judges, who judge each round based on aggression. Adamek was able to use both hands during the bout.