As a reporter for Stern, he had the opportunity to portray the boxer Muhammad Ali in 1964, continuing to do so at regular intervals for 10 years. In 1966 Hoepker and his then wife, Stern journalist Eva Windmöller, joined the boxing legend in London and Chicago. In 1970, Hoepker was on hand with his camera when Ali, who had been out of the ring for some time, was preparing himself for the “fight of the century” against Joe Frazier. He met up with him again years later when he was already debilitated by Parkinson’s. Many of these pictures are known worldwide and have become icons of photography. They have been widely exhibited in museums and represented in many collections.