Ryan Burton catches up with trainer Ronnie Shields to discuss Saturday's co-featured fight, at The Pearl at Palms Casino Resort in Las Vegas and will air live on SHOWTIME (10 p.m. ET/7 p.m. PT), when Jermell Charlo takes on Vanes Martirosyan in super welterweight action. The SHOWTIME CHAMPIONSHIP BOXING telecast will also be available in Spanish via secondary audio programming (SAP). Tickets for the live event are priced at $200, $100, $75, $50, and $25, plus applicable fees are on sale today. Tickets may be purchased by calling Ticketmaster at (800) 745-3000 or by clicking HERE. Tickets are also available online at www.ticketmaster.com.