Hans Moldenhauer

Daniel Prenn (left) and Moldenhauer

Moldenhauer won back-to-back German National Championships in 1926 and 1927, and made his third successive final in 1928 where he lost to Daniel Prenn.[3] He also won the Danish Championship Men's Singles in 1929.

Moldenhauer played 22 times for Germany in the Davis Cup in 1927, 1928, and 1929.

In the 1929 French Championships, entering the tournament as the 16th seed, Moldenhauer was the only German to make the fourth round. His defeat in the fourth round was to the top seed, Henri Cochet.

He competed in the 1929 Wimbledon Championships and reached the second round, where he lost in five sets to fifth seed Umberto De Morpurgo, an Italian whom he had beaten just weeks earlier in an International Lawn Tennis Challenge rubber. That match also went to five sets.[4]

The German team led by Moldenhauer would win that tie against the Italy and also defeated Czechoslovakia in Prague, where Moldenhauer won two rubbers, including the doubles, partnering Prenn.[4] This put Germany into the 1929 European Zone final against Great Britain, which they won 3-2, with Moldenhauer winning a singles rubber over Bunny Austin.[4] They were then whitewashed in the Inter-Zone final by the United States.[4] Moldenhauer lost all three of his rubbers, one of which was against Bill Tilden.[4] It was Moldenhauer's final International Lawn Tennis Challenge appearance, meaning he finished with 14 career wins, from 22 matches.[4]