High Quality Content by WIKIPEDIA articles! Dejan Zavec (born March 13, 1976) is a Slovenian professional boxer who held the IBF Welterweight Champion title from December 2009 until September 3, 2011, when he lost it to Andre Berto. He boxes under the name Jan Zaveck. His professional record includes 33 fights: 31 wins (18 knockouts), 2 losses, and 1 no-contest. Zavec is the only Slovenian boxer ever to hold a world boxing champion title. In December 2010, he was proclaimed Slovenian Sportsman of the Year.