Portugal's Algarve circuit is set to return to the Formula One calendar this season, taking the vacant slot left by Vietnam on May 2.
The BBC and Sky Sports television said teams would be told officially at a meeting of the F1 commission on Thursday that the third round of the season would be in Portugal.
Sources told Reuters the news, first reported by motorsport.com, was correct.
The Algarve circuit near Portimao hosted a grand prix for the first time last October on a heavily revised calendar due to the COVID-19 pandemic.
The return would have been confirmed last month but that was thrown into doubt by the country seeing a spike in cases and imposing a nationwide lockdown.