By Ruslan Chikov
According to K2 Promotions, WBA middleweight champion Felix Sturm (36--2-2, 15KOs) has until September to make a mandatory title defense against Gennady Golovkin. Sturm has a fight scheduled for April 13th against Sebastian Zbik (30-1, 10KOs). The WBA allowed Sturm to move forward with Zbik, with the condition that he fights Golovkin (22-0, 19KOs) by September. Golovkin has been waiting to secure his title opportunity for quite some time.