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 1924 International Lawn Tennis Challenge was the 19th edition of what is now known as the Davis Cup. The tournament was, for the second straight year, divided into the America and Europe Zones. 17 teams competed in the Europe Zone, and 6 in America. China, Cuba, Hungary, Mexico, and New Zealand all competed for the first time, and South Africa and Austria returned to create the largest field to date.
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 1927 International Lawn Tennis Challenge was the 22nd edition of what is now known as the Davis Cup. 21 teams entered the Europe Zone, while 4 entered the America Zone. Yugoslavia and Greece competed for the first time, while Germany returned to the competition for the first time since 1914.
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 1932 International Lawn Tennis Challenge was the 27th edition of what is now known as the Davis Cup. 22 teams would enter the Europe Zone; while 8 would enter the Americas Zone, 5 in North America and 3 in South America.
The 1933 International Lawn Tennis Challenge was the 28th edition of what is now known as the Davis Cup. 24 teams would enter the Europe Zone; while 9 would enter the Americas Zone, 4 in North America and 5 in South America.
The 1934 International Lawn Tennis Challenge was the 29th edition of what is now known as the Davis Cup. 10 teams would enter the Europe Zone, while only 5 would enter the Americas Zone, 3 in North America and 2 in South America. Due to the large number of entries in Europe, a "Qualifying Round" system was introduced in order to better manage the number of teams competing. European teams which lost before the 1933 Europe Zone semifinals would play-off against each other for four spots in the 1934 Europe Zone main draw.
The 1935 International Lawn Tennis Challenge was the 30th edition of what is now known as the Davis Cup. Due to increased political tensions in Europe, entries for the Europe Zone declined sharply, causing the Qualifying Round system to be scrapped. Only 11 teams would enter the Europe Zone, with 17 teams entering the qualifying rounds; while six would enter the Americas Zone, 4 in North America and 2 in South America. Estonia entered the tournament for the first time.
The 1936 International Lawn Tennis Challenge was the 31st edition of what is now known as the Davis Cup. Due to the low number of competing South American teams, the North & Central America and South America Zones were scrapped and the Americas played in one unified zone. From this edition, the Qualifying Round system of the Europe Zone was scrapped. 19 teams entered the Europe Zone, while 4 teams entered the Americas Zone.
The 1937 International Lawn Tennis Challenge was the 32nd edition of what is now known as the Davis Cup. 20 teams entered the Europe Zone, while 4 teams entered the Americas Zone.
The 1939 International Lawn Tennis Challenge was the 34th edition of what is now known as the Davis Cup. 20 teams entered the Europe Zone, while 7 entered the America Zone.
The 1959 Davis Cup was the 48th edition of the Davis Cup, the most important tournament between national teams in men's tennis. 27 teams entered the Europe Zone, 8 teams entered the Eastern Zone, and 7 teams entered the America Zone. The Europe Zone was modified so that only the previous year's semifinalists were guaranteed first round byes, allowing more countries to compete. Colombia made its first appearance 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 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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