A purse bid procedure was held at the IBF headquarters today to determine who will promote the IBF middleweight championship mandatory defense fight. There were only two bidders, Bash Boxing, Inc and Sauerland Event GmbH. Bash Boxing won with a bid of $ 616,515 and Sauerland Event GmbH bid $ 521,414. The purse bid split will be 75% to the reigning champion Sebastian Sylvester (33-3, 16 KOs) of Germany and 25% to IBF #1 mandatory challenger Roman Karmazin (40-3-1, 26 KOs) of Russia. The fight must take place within 90 days of March 9, 2010 or no later than June 9, 2010.