The finals, formerly known as World Group, is the highest level of Billie Jean King Cup competition in 2020–21. It was originally scheduled to be played on indoor clay courts at the László Papp Budapest Sports Arena in Budapest, Hungary, from 14 until 19 April 2020, but was postponed due to COVID-19. The new venue was established to be the O2 Arena, in Prague, on indoor hard (Rebound Ace ...
https://en.wikipedia.org/wiki/2020–21_Billie_Jean_King_Cup_Finals