The opening rounds established the pattern. Lopez advanced behind his jab, worked the body and remained active enough to score without taking major risks. Romero circled at long range and waited for the challenger to make a mistake. His selective counters occasionally landed, but he gave away too much time between punches.

Everything changed in the fifth. A left hand from Romero cut Lopez over the right eyebrow and hurt him. Another attack forced Lopez onto the defensive as the crowd responded with loud chants for the champion.

Romero had finally found the weakness he needed, but he did not continue attacking it. Lopez regained his composure during the following round and returned to applying steady pressure. His corner kept the cut under control, allowing him to fight without showing any urgency or concern over the injury.

Later rounds became increasingly frustrating for the crowd. Lopez moved forward and accumulated points with his jab, body punches and occasional right hands. Romero continued looking for a single counter rather than increasing his work rate. By the 11th, he needed far more than the isolated punches he was throwing.

Instructions from Romero’s corner to remain in the center before the 12th produced little change. The champion stayed cautious and allowed Lopez to complete the fight without facing another dangerous assault.

Lopez did not overwhelm Romero or demonstrate devastating welterweight power. He won because he understood the situation better, maintained a consistent pace and refused to give away rounds while searching for something dramatic.

The victory made Lopez a three-division world champion in his first fight at 147 pounds. Romero had the power to change the outcome, as the fifth round showed, but lacked the activity and urgency required to keep his title.