WASHINGTON—Bernard Hopkins will attempt to become the oldest fighter in boxing history to unify world titles when the IBF light heavyweight champion opposes WBA champion Beibut Shumenov on April 19th at the DC Armory. Hopkins (54-6-2, 32 KOs), of Philadelphia, captured the IBF crown in March 2013 with a decision over Tavoris Cloud. He successfully defended it with an October win against Karo Murat. Shumenov (14-1, 9 KOs) is a 30-year-old native of Kazakhstan who lives in Las Vegas. He won the WBA title by defeating Gabriel Campillo in 2010 and has made five successful defenses.