Giovanni Segura, THE RING's No. 4 junior flyweight contender, avenged the only loss of his pro career with a brutal fourth-round knockout of Cesar Chanchila in Baja California, Mexico on Saturday night.

Segura (20-1-1, 16 knockouts), a power-punching southpaw, dropped Canchila (27-1, 21 KOs) in rounds one and two before finally finishing off the tough and talented Colombian, who was rated No. 3 by THE RING after he out-worked and out-classed the Southern California-based Mexican to a unanimous decision last June.

Segura backed up and repeatedly stunned Canchila in the first round before dropping the boxer-puncher with right hook before the bell. Canchila got up on wobbly legs but wanted to continue. To his credit, Canchila took the fight to Segura in the second, trading punches on even terms with the Bell, Calif.-resident until a big sweeping left hand deposited him to the canvas for the second time near the end of the round.

Segura landed hard hooks and crosses that put Canchila's back to the ropes in the opening minute of the third round, but the gutsy Colombian fought back, forcing the slugfest into the center of the ring. However, Segura finished strong, pinning Canchila to the ropes again before the round ended.

Segura hurt Canchila to with a left to the body in the beginning of a slightly long fourth round, which set up a series of right hooks that once again backed Canchila to the ropes where the two exchanged brutal body punches. The 108 pounders went toe to toe in the final seconds of the round with Segura landing a big left just as the bell sounded to end the fourth. However, referee Julio Alvarado did not appear to hear the bell's first ring, which gave Segura the opportunity to land two more monster left hands that had Canchila reeling in the 6-7 seconds it took for Alvarado to react to the follow-up rings. Canchila's corner decided their fighter had had enough and did not appear to protest the referee's slip up in not breaking up the fighters sooner.

Segura, who picked up the interim WBA title with the hard-fought victory, was obviously better prepared for their rematch, shocking Canchila, who already had a showdown scheduled with THE RING 108-pound champ Ivan Calderon in May.

One other interesting note about the fight, which was televised on Azteca America in the U.S., is that Javier Capetillo was in Segura's corner.

Capetillo, best known as Antonio Margarito's trainer, had his license revoked by the California State Athletic Commission along with his star fighter last month for illegally tampering with the former welterweight titleholder's hand wraps before the Jan. 24 fight with Shane Mosley. The license revocation bars Capetillo from working the corner of fights that take place in the U.S., but obviously Capetillo's ban is not recognized in Mexico.