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A quartet of power-punching junior lightweights will take the spotlight when WORLD CHAMPIONSHIP BOXING: MARCO ANTONIO BARRERA VS. ROCKY JUAREZ AND JORGE BARRIOS VS. JANOS NAGY is seen live from the Staples Center in Los Angeles on SATURDAY, MAY 20 (10:30 p.m. ET/7:30 p.m. PT). The HBO Sports team of Jim Lampley, Larry Merchant and Emanuel Steward will be ringside for the event, which will be available in HDTV, as well as closed-captioned for the hearing-impaired and presented in Spanish on HBO Latino.

HBO2 playdates: May 21 (9:00 a.m., 5:30 p.m.) and 23 (11:00 p.m.). Times are ET/PT. Battle-tested veteran and reigning belt-holder Marco Antonio Barrera has spent half his life as a pro fighter, amassing a prodigious record of 61-4, 42 KOs. With titles in three separate weight classes, the Mexican fighter's accomplishments put him in an elite category of boxers. When Barrera, 32, squares off against Rocky Juarez in a 12-round bout for the world junior lightweight championship, he will have the opportunity to enhance an already illustrious career.

Part of an up-and-coming class of exciting young junior lightweights, Rocky Juarez (25-1, 18 KOs), 26, is fighting to forge his own legacy. The Houston native has lost only once in his professional career and intends to keep it that way. Regardless of which warrior emerges victorious, fans can expect a terrific showdown between two hard-hitting fighters.

Two more junior lightweights make their HBO debuts in the opening bout. Jorge Barrios (45-2-1, 32 KOs) of Buenos Aires is an eccentric performer and one of the sport's toughest battlers. Hungary's left-handed Janos Nagy (23-0, 14 KOs) will be looking to extend his unbeaten record in this 12-round showdown at 130 pounds.

HBO offers high definition television with East and West Coast feeds of its main programming channel. Currently, most WORLD CHAMPIONSHIP BOXING events are broadcast in HDTV. HBO viewers must have access to the HBO HDTV channel to watch HBO programming in high definition.