By Ryan Burton

LAS VEGAS - Fight week officially kicked-off Wednesday with fighter grand arrivals and media workouts before the Premier Boxing Champions event this Saturday, January 28 from the MGM Grand Garden Arena in Las Vegas and live on SHOWTIME.

Headlining the SHOWTIME CHAMPIONSHIP BOXING card and Wednesday's workout were featherweight world champion Carl Frampton and former three-division world champion Leo Santa Cruz, who meet in a rematch of their July Fight of the Year candidate. Televised action begins at 10 p.m. ET/7 p.m. PT with undefeated lightweight world champion Dejan Zlaticanin battling former two-division world champion Mikey Garcia.

Also participating in the workout were a pair of fighters who will be featured on SHOWTIME EXTREME beginning at 8 p.m. ET/PT. Featherweight world champion Lee Selby defends his title against former champion Jonathan Victor Barros while undefeated rising star David Benavidez takes on once-beaten Sherali Mamadjanov.

Tickets for the live event, which is promoted by Ringstar Sports in association with Cyclone Promotions and TGB Promotions, are priced at $504, $404, $304, $204, $104 and $54, and are on sale. Tickets are available at .  

ABOUT FRAMPTON vs. SANTA CRUZ 2 - Carl Frampton vs. Leo Santa Cruz 2 is a world championship rematch of the 2016 Fight of the Year candidate featherweight showdown. The 12-round bout headlines SHOWTIME CHAMPIONSHIP BOXING action on Saturday, January 28 from the MGM Grand Garden Arena in Las Vegas. In the co-main event, lightweight world champion Dejan Zlaticanin will meet former two-division champion Mikey Garcia in the opening bout on SHOWTIME at 10 p.m. ET/7 p.m. PT.

Featherweight world champion Lee Selby will fight for the second time in the United States when he battles former world champion Jonathan Victor Barros in action on SHOWTIME EXTREME beginning at 8 p.m. ET/PT.