Race organisers have insisted that the Brazilian Grand Prix remains on track for the future.
Earlier, F1 authorities cast a shadow over the race by giving the Interlagos round mere provisional status on the 2017 calendar.
However, Sao Paulo mayor Fernando Haddad on Saturday inaugurated the latest building works at the track, while promoter Tamas Rohonyi insisted that the race's future is secure until 2020.
"We will fulfil our contract," he is quoted as saying.
"The race is confirmed until 2020, as it is in our contract."
On Saturday, Tamas was with mayor Haddad to reveal the latest finished buildings as part of Interlagos's renovation works. It is believed that delays were behind F1 supremo Bernie Ecclestone's decision to give the 2017 race an asterisk.
