Formula One calendar is set to greet two new circuits in F1 2020 season at the same time, another old two will leave if the championship is going to remain at its current 21 events.

However, as we know that there are five circuits on this year's table where they have not been confirmed for the 2020 season.

Until today, there are many speculations that three of these five races will stay in the calendar for the next year, so who are these threatened five circuits? And which two rounds would you like to keep it the most?

Silverstone Circuit (British Grand Prix) 

Rumors says that Silverstone, near the village of Silverstone in Northamptonshire in England, could lose and fail to retain its place in the calendar of the world championship. As we know, the British Grand Prix has been secured for a long-term since 2009 by the former chief executive of the F1 Group, Bernie Ecclestone.

The British race is the oldest in the Formula One calendar as the 1950 race at Silverstone was round one of the first championship seasons in 1950. It and the Italian Grand Prix are the only two Formula One World Championship Grands Prix that have been staged during every season that the championship has been held.

Last year was the 69th event that the race had been run as a World Championship event since the inaugural season in 1950, and the 52nd time that a World Championship round had been held at Silverstone.

So, will it be the last British Grand Prix unless a new deal is signed during this month or Lewis Hamilton, and the new talents like Lando Norris and George Russell will be missing their home GP for the upcoming years? A “Breixt” but in F1 style.

Circuit de Catalunya Circuit (Spanish Grand Prix)

Circuit de Catalunya who is F1’s exclusive pre-season testing location in recent seasons, also has been in the threat list to leave the F1 2020 calendar as the home of Spain’s Grand Prix of the world championship since 199.

One of the main reason could be the departure of local hero Fernando Alonso from the Formula One world championship last year as the crowds have visibly vaded at the track to support their "El Matador" Although, young Carlos Sainz who races with Mclaren with a multi-year deal is a great representative for his country.

However, there is a big chance for the country which used to hold two Grands Prix per season to leave the calendar soon with no deal, let's wait and see!

Hockenheimring Circuit (German Grand Prix)

As the other classic British GP and the Spanish Circuit, the home of Mercedes AMG F1 team and Sebastian Vettel as well as Nico Hulkenberg, Germany GP could lose its place in the calendar.

The same condition as the Spanish GP goes with the Germany GP by the departure of the legend and local hero Michael Schumacher as they have used to hold F1 events in two different circuits.

Monza Circuit (Italian Grand Prix)

The Temple of speed has never failed to host a Grand Prix of the world championship as it is considered one of the longest running events on the Formula One calendar since the championship was introduced in 1950. However, Monza is the fifth oldest national Grand Prix, Ferrari's sweetheart circuit as well as a unique and historic circuit next to a beautiful city, the home of all Tifosi around the world no matter where they are from.

Liberty Media admitted the sport’s popularity took a hit last year when broadcasts moved from free-to-air television to a pay-TV channel. There’s a lesson for Britain’s round of the world championship there, too

How possible Ferrari could lose Autodromo Nazionale di Monza? It's the home race of Scuderia Ferrari, but will it be kept the cathedral of speed in the calendar anyhow? 

Autodromo Hermanos Rodriguez Circuit (Mexico Grand Prix)

Well, Mexico has a different issue here than the other four circuits in the Europ. Mexico has appeared as a non-championship event in 1962, however, the Latin American Grand Prix returned to the sport back in 2015 at the Mexico City circuit after a long absence from the calendar.

This return has had a great benefit for the country, as the money currently spent on bringing F1 to town is being earmarked for an infrastructure development project. So the future of the sport in the country is related to how to find another source of funding so Liberty Media do the job of extension.