1981-12-10 Sam Serrano w rsc 12 (15) Hikaru Tomonari, Roberto Clemente Coliseum, San Juan, Puerto Rico - WBA
1981-12-10 Sam Serrano w rsc 12 (15) Hikaru Tomonari, Roberto Clemente Coliseum, San Juan, Puerto Rico - WBA. Referee: Larry Rozadilla. Abandoning his usual jab-and-move routine the champion attacked Tomonari (130) from the start, but lacked the power to knock him out and eventually settled down to box his way to victory. By the sixth round, Serrano (129) was way out in front and a solid right to the nose further damaged Tomonari, who was also carrying a badly cut mouth at this stage. With Serrano scoring freely in the 12th a worsening cut on Tomonari’s left eye forced the referee to seek the doctor’s advice, and although the injury was deemed not serious enough on its own for the fight to be stopped the fact that the challenger was so far behind saw matters ended with 80 seconds of the round remaining.