The Billie Jean King Cup Finals must find a new home after the International Tennis Federation terminated its contract with host city Budapest.
The inaugural 12-team competition, due to take place in April 2020, was cancelled because of coronavirus.
This year's event has been postponed until the end of the season, leaving the ITF a small window to secure a new host in very uncertain times.
Any new deal is likely to be significantly inferior financially.
The three-year agreement with Budapest provided $12m (£8.6m) per year for the players and a further $6m (£4.3m) for national federations.