Adnan Ćatić (born 31 January 1979), better known as Felix Sturm, is a Bosnian-German professional boxer. He has held multiple world championships in two weight classes, including the WBO middleweight title from 2003 to 2004, the WBA middleweight title twice between 2006 and 2012, the IBF middleweight title from 2013 to 2014, and the WBA (Super) super-middleweight title in 2016. As an amateur, Sturm won a gold medal at the 2000 European Championships in the light-middleweight division.