The 1920 International Lawn Tennis Challenge was the 15th edition of what is now known as the Davis Cup. The Netherlands joined the competition for the first time. "Big" Bill Tilden and "Little" Bill Johnston made their debut for the United States, and would not lose a rubber the entire tournament. In the challenge round, they reclaimed the cup from Australia. The final was played at the Domain Cricket Club in Auckland, New Zealand on 30 December - 1 January 1921.
Playoff
Netherlands competed for the first time.
References
1920 International Lawn Tennis Challenge Wikipedia(Text) CC BY-SA