The opening rounds were tentative, with Klitschko seemingly struggling with Thompson's awkward southpaw style. All three judges gave the first round to Thompson. In the second round, both fighters suffered a cut above the right eye after an accidental headbutt. Klitschko's eye began to swell after Thompson caught him with the right hook in the fifth round. After the sixth round, however, Klitschko appeared to have established his dominance in the ring, hurting Thompson with several straight right hands. After the seventh round, both fighter started showing signs of fatigue. In the tenth round, Thompson fell to the canvas during a clinch. It appeared as if Thompson fell down mostly due to being tired rather than being pushed by Klitschko. In the middle of the eleventh, Thompson was caught with the straight right hand which he did not see coming, falling to the canvas again, with the referee starting the count this time. Thompson beat the count but was unsteady on his feet, prompting the referee to stop the fight. At the time of the stoppage, Thompson was trailing on the scorecards, with scores 92–98 (twice) and 91–99.