On Sunday at Araneta Coliseum in Quezon City, flyweight Nonito Donaire won his 20th straight bout by defending the IBF and IBO title belts with a fourth round stoppage of previously unbeaten Raul Martinez of America.

Despite having previously won regional titles at as high as bantamweight, Martinez, 24-1 (14), was no match for Donaire, who retained his belts for the third time since shocking Vic Darchinyan almost two years ago.

Speaking of upsets, American Brian Viloria overcame the odds to knock out reigning IBF Light Fly Champion Ulises Solis, who had placed his world title at risk for the ninth time.

Solis, 28-2-2 (20), hadn't lost in nearly five years but had problems with the sheer strength and body attack of Viloria, 25-2 (15), who had previously held the WBC Light Flyweight crown.

In another bout on the bill, minimumweight Denver Cuello, 16-2 (5), captured the vacant WBC International strap with a fourth round stoppage of Hiroshi Matsumoto, 18-10-4 (8).

Ulises Solis, 27-1-2 (20), led the way on a big card south of the border at Palenque De La Expo in Hermosillo, Mexico as the longtime IBF Light Flyweight Champion outpointed Filipino veteran Glenn Donaire, 17-4-1 (9), by wide margins to retain his crown for the seventh time.

Rising light middleweight star Julio Cesar Chavez Jr, 37-0-1 (29), was given all he could handle by American campaigner Matt Vanda, 38-7 (21), but managed to pull out a split decision verdict via wildly disparate scorecards.

Undefeated former WBA Light Flyweight kingpin Koki Kameda, 18-0 (12), of Japan stopped Marino Montiel, 30-13-1 (16), in two frames of a ten rounder at super flyweight and flyweight hot prospect Hernan "Tyson" Marquez, 19-0 (14), decisioned German Meraz, 17-10-1 (5), over eight rounds in a rematch.

Over his last 11 bouts, Marquez has only failed to win two of them early, both times facing Meraz.

Former two-time world title challenger at super bantam, Ricardo Castillo, 34-6 (23), returned from a failed bid at the Mexican title in May by stopping Guadalupe Arce, 2-36 (0), in the second.