The 1921 International Lawn Tennis Challenge was the 16th edition of what is now known as the Davis Cup. In the playoff finals, newcomers Japan surprised Australasia, 4-1, but would fall to defending champions the United States in the Challenge Round. The final was played at the West Side Tennis Club in New York City, United States on 2–5 September.
The 1922 International Lawn Tennis Challenge was the 17th edition of what is now known as the Davis Cup. The tournament saw first-time entries from Italy and Romania. Australasia would storm through the preliminary round, but would fall to defending champions the United States in the challenge round. The final was played at the West Side Tennis Club in New York City, United States on 1–5 September.
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.
The 1925 International Lawn Tennis Challenge was the 20th edition of what is now known as the Davis Cup. Sixteen teams would enter the Europe Zone, while 9 would enter the America Zone. Chile, Portugal, Poland and Sweden competed for the first time.
The 1926 International Lawn Tennis Challenge was the 21st edition of what is now known as the Davis Cup. 19 teams would enter the Europe Zone, while 5 would enter the America Zone.
The 1928 International Lawn Tennis Challenge was the 23rd edition of what is now known as the Davis Cup. 27 teams would enter the Europe Zone, while six would enter the America Zone. Chile, Finland, and Norway made their first appearances in the competition.
The 1929 International Lawn Tennis Challenge was the 24th edition of what is now known as the Davis Cup. 24 teams would enter the Europe Zone, while five would enter the America Zone. Egypt and Monaco participated for the first time.
The 1930 International Lawn Tennis Challenge was the 25th edition of what is now known as the Davis Cup. For the silver anniversary, 24 teams would enter the Europe Zone, while 4 would enter the America Zone.
The 1931 International Lawn Tennis Challenge was the 26th edition of what is now known as the Davis Cup. Due to an increase in South American entries, the America Zone was split into the North & Central America Zone and the South America Zone. The winner of each sub-zone would play to determine who moved to the Inter-Zonal round. 22 teams would enter the Europe Zone, while 8 would enter the America Zone. These included first-time entries from Brazil, Paraguay and Uruguay, although Brazil withdrew without playing a tie, and Paraguay would not play their second tie until 1982. This year also marked the first time that ties were played in South America.
The 1938 International Lawn Tennis Challenge was the 33rd edition of what is now known as the Davis Cup. 21 teams entered the Europe Zone, while 4 entered the Americas Zone.
The 1947 Davis Cup was the 36th edition of the most important tournament between national teams in men's tennis. 20 teams entered the Europe Zone, and 2 teams entered the America Zone. Luxembourg competed for the first time.
The 1950 Davis Cup was the 39th edition of the most important tournament between national teams in men's tennis. 22 teams entered the Europe Zone, and 4 teams entered the America Zone. Play took place on Asian soil for the first time, when the Philippines hosted Pakistan in Manila for their first-round Europe Zone tie.
The 1953 Davis Cup was the 42nd edition of the Davis Cup, the most important tournament between national teams in men's tennis. 24 teams entered the Europe Zone, 6 teams entered the America Zone, and India was the sole competitor in the Eastern Zone. This year saw the first appearances in the competition of both Ceylon and a team representing the West Indies. For the first time play took place on the African continent, when the first-round Europe Zone tie between Egypt and Austria was held in Cairo.
The 1955 Davis Cup was the 44th edition of the Davis Cup, the most important tournament between national teams in men's tennis. 24 teams entered the Europe Zone, 7 teams entered the America Zone, and 3 teams entered the newly reinstated Eastern Zone. Burma competed for the first time.
The 1957 Davis Cup was the 46th edition of the Davis Cup, the most important tournament between national teams in men's tennis. 24 teams entered the Europe Zone, 7 teams entered the America Zone, and 5 teams entered the Eastern Zone. Malaya, Lebanon and Venezuela made their first appearances in the competition.
The 1961 Davis Cup was the 50th edition of the Davis Cup, the most important tournament between national teams in men's tennis. 28 teams entered the Europe Zone, 7 teams entered the Americas Zone, and 7 teams entered the Eastern Zone. Ecuador, Indonesia and Morocco made their first appearances in the tournament.
The 1963 Davis Cup was the 52nd edition of the Davis Cup, the most important tournament between national teams in men's tennis. 32 teams entered the Europe Zone, 9 teams entered the Eastern Zone, and 7 teams entered the America Zone. Rhodesia made its first appearance in the tournament.
The 1966 Davis Cup was the 55th edition of the Davis Cup, the most important tournament between national teams in men's tennis. 32 teams entered the Europe Zone, 8 teams entered the Eastern Zone, and 6 teams entered the America Zone.
The 1968 Davis Cup was the 57th edition of the Davis Cup, the most important tournament between national teams in men's tennis. 32 teams entered the Europe Zone, 9 teams entered the Americas Zone, and 8 teams entered the Eastern Zone. Peru made its first appearance in the tournament, having previously entered on 3 separate occasions before subsequently withdrawing before competing in a tie.
The 1969 Davis Cup was the 58th edition of the Davis Cup, the most important tournament between national teams in men's tennis. 32 teams entered the Europe Zone, 9 teams entered the Americas Zone, and 8 teams entered the Eastern Zone.
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