Formula 1 has confirmed two further races on the 2020 schedule, with events at Mugello and Sochi to follow the initial batch of eight events.
As expected Grand Prix of Tuscany in Mugello follows Spa and Monza on 13 September as the third leg of a triple-header, while the Russian Grand Prix will retain its original 27 September date.
Sochi will also be the first "flyaway" race of the season with the cars and equipment travelling by plane.
Ferrari-owned Mugello will be the site of the Maranello team's 1000th GP.
"We are delighted to announce Mugello and Sochi will be part of the 2020 calendar," said F1 boss Chase Carey. "And want to thank all our partners for their support in recent weeks.
"We had great start to our season in Austria last weekend and we are increasingly confident in our plans to race throughout the remainder of 2020.
"The Russian Grand Prix is a major moment in our season, and we are looking forward to being back in Sochi in September. We are equally excited to see Formula 1 race for the first time at Mugello, an occasion that will mark Ferrari's 1000th Grand Prix.
"Both races will be a huge boost for fans with more announcements on the next races in our calendar coming in the weeks ahead."
Ferrari boss Mattia Binotto said the news was a boost for Ferrari and its plans to celebrate its 1000th Grand Prix.
"I want to thank the promoter for all their hard work to make this happen," said Binotto. "I know all our fans will be excited to see us go racing at this amazing circuit and Ferrari tifosi will be treated to a celebration of the team's 1000th race.
"To be able to celebrate an extraordinary anniversary like the 1000th grand prix for Scuderia Ferrari at our own home at Mugello is an incredible opportunity, Mugello is not just one of the most spectacular and challenging tracks for drivers and cars, it is also a structure that has made sustainability one of its priorities.
"This commitment has taken it to levels of excellence both for Italy and the world. There are lots of people to whom we send thanks for turning this opportunity into reality - above all Formula 1's Chairman and CEO Chase Carey, who knows and appreciates the value that our team represents for this sport, to the extent that he was prepared to recognise this anniversary in the official name of the event.
"For me personally, Mugello is linked to the memories of so many days of testing that I have worked at along with the rest of the team in a bid to improve the car, sometimes dreaming of taking on our opponents there.
"To think that today we are about to have an event like a grand prix there - and the thousandth in our Formula 1 history no less - is a wonderful feeling. I can't wait for that dream to come true on 13 September."
No other races have been confirmed thus far, but the next announcement is expected to include Portimao, Shanghai and Hanoi, all of which are being lined up for October.
November is also still to be filled pending firm decisions on Austin, Interlagos and Mexico City, but sources suggest that none look likely to happen and European races could be slotted in in their place.
The season is expected to end with two races in Bahrain on 29 November and 6 December, prior to the Abu Dhabi finale on 13 December.
Imola and Hockenheim remain on standby and could be slotted into any gaps, local weather considerations permitting.