Hopp is the chief financial backer of the German football club TSG 1899 Hoffenheim. When Hopp, who had played in the club's youth setup, started supporting the club in 2000, Hoffenheim were playing in the fifth division of German football. Today, Hoffenheim are in the First Bundesliga, and in their first season in the top FLIGHT in 2008–09, they led the league at its winter break. Hopp also spent €100 million to build a new 30,000-seat stadium called Rhein-Neckar-Arena near Sinsheim for the club. He owns a home in Naples, Florida, US.