New York,NY  ---  2012 Fighter of the Year and WBO World Jr. Featherweight champion Nonito "Filipino Flash" Donaire runs during an intense training session in New York City Monday night to prepare for his upcoming world championship battle against undefeated WBA World Super Bantamweight champion Guillermo Rigondeaux ,  Saturday, April 13 at the historic Radio City Music Hall in New York City and televised live on HBO World Championship Boxing®.  Promoted by Top Rank, in association with Caribe Promotions, Tecate and Madison Square Garden, tickets priced at $300, $150, $75 and $35, are available for purchase at the Radio City Music Hall Box Office, Madison Square Garden Box Office, Ticketmaster charge by phone (866-858-0008) and online at ,  and .     --- Photos by Chris Farina/Top Rank.