The 1923 International Lawn Tennis Challenge was the 18th edition of what is now known as the Davis Cup. For the first time, the competition was split into two zones: the America Zone and the Europe Zone. This change was necessitated by having more than 16 teams compete for the cup. The past several years had also seen a rise in the number of defaults, as teams from around the globe tried to work out the logistics of playing such an international tournament. Regional zones would help alleviate these problems.