Otto Froitzheim was a German tennis player. He won the singles and doubles titles at the World Hard Court Championships in 1912. He also won an Olympic Silver medal in singles in 1908 and was a finalist at Wimbledon in 1914.

World Hard Court Championships were an annual major tennis tournament sanctioned by the International Lawn Tennis Federation, held from 1912 to 1923. It was principally held in Paris, on clay courts of the Stade Français in the Paris suburb of Saint-Cloud, with one exception when they were held at the Royal Leopold Club in Brussels, Belgium, in 1922.