Baden Baden International

The Baden Baden International also known as the Baden-Baden tennis tournament and the Baden Baden Invitational was a tennis event held from 1896 through 1966 in Baden-Baden, Baden-Württemberg, Germany on outdoor Clay courts.
History.
The Baden Baden tournament was first held in 1896 played at the Baden Baden Lawn Tennis Club, Baden-Baden, Germany the tournament fluctuated between July, August, and September over the course of its run the tournament survived for 55 years with various breaks due to the first and second world wars.
Champions.
Notes: Challenge Round: The Final round of a tournament, in which the winner of a single-elimination phase faces the previous year's champion, who plays only that one match. The challenge round was used in the early history of tennis (from 1877 through 1921) in some tournaments not all. * Indicates challenger