- Source: 2020 Billie Jean King Cup play-offs
- 2020 Billie Jean King Cup play-offs
- 2020–21 Billie Jean King Cup
- Billie Jean King Cup
- 2020 Billie Jean King Cup Americas Zone Group I – play-offs
- 2020–21 Billie Jean King Cup finals
- 2020–21 Billie Jean King Cup Americas Zone
- 2020 Billie Jean King Cup Europe/Africa Zone Group I – play-offs
- Kazakhstan Billie Jean King Cup team
- Switzerland Billie Jean King Cup team
- Russia Billie Jean King Cup team
The 2020–21 Billie Jean King Cup play-offs was originally scheduled to be held from 17 to 18 April 2020 but was postponed to the following year due to COVID-19. The eight winners of this round will qualify for the 2022 Billie Jean King Cup qualifying round while the eight losers will contest their respective regional Group I event in 2022.
Teams
Sixteen teams will play for eight spots in the 2021 qualifying round, in series decided on a home and away basis.
These Sixteen teams are:
8 losing teams from Qualifying round.
8 winning teams from their Group I zone.
Eight winners will advance to the 2021 qualifying round and eight losers will contest their respective regional Group I event in 2021.