By Mark Vester

Later tonight, WBO featherweight champion Juan Manuel Lopez will make the first defense of his title against top rated Bernabe Concepcion. The fight headlines a Showtime televised doubleheader from the Coliseo Jose Miguel Agrelot in Hato Rey, Puerto Rico. In the televised co-feature, Nonito Donaire will defend his WBA interim-super flyweight title against Hernan "Tyson" Marquez of Mexico.

Undercard Results

Super bantamweight Jonathan Oquendo (19-2, 12KOs) knocked out Eden Sonsona (21-6) in the ninth round of their WBO eliminator. Oquendo sets himself up for a possible fight with champion and countryman Wilfredo Vazquez Jr.

Heavyweight prospect Victor Bisbal (17-1, 12KOs) destroyed journeyman David Whittom (10-13) in the first round.

Welterweight prospect Jose A. Gonzalez (11-0, 7KOs) stopped Matthew Robinson (3-2) in the first round.

Cruiserweight prospect Carlos Negron (10-0, 7KOs) won a unanimous decision over Gustavo Enriquez (15-10, 12KOs).