Pirelli has concluded the first test of the 18 inch tyres that Formula One is set to introduce in 2021.

While Esteban Ocon was on duty for the Italian tyre manufacturer, testing 2020 compounds on a Mercedes - his first outing in the W10, despite being test driver for the German team - Sergey Sirotkin was at the wheel of a modifies Renault as he gave the 18 inch tyres their F1 debut.

Completing 94 laps of the Paul Ricard track on Thursday, today the Russian added a further 16 laps to his tally.

The Paul Ricard test with Renault follows tests on a modified F2 car, ahead of that series introduction of 18 inch tyres next season, and a demo run by Jean Alesi at Monza last weekend.

"We were delighted to open up a brand new chapter at Paul Ricard, with the debut for our 18-inch tyres, which will change the face of Formula 1, taking place alongside our latest development test for next year's 13-inch tyres," said Mario Isola.

"Renault provided a 2018 mule car for the 18-inch test, with Sergey Sirotkin driving to mark this historic moment.

"We completed our planned programme as expected, covering 213 laps with the 18-inch tyres over two days," he continued. "This was very useful for us to take a first look at the new generation of tyres and start shaping the development path that we will follow for the remainder of this year and next year.

"Of course, it is hard to read too much into this test as these are still very early days, but we have accumulated all the preliminary data that we wanted in good weather conditions, so thank you very much to Renault and to Sergey for their availability.

"With the 13-inch 2020 tyres, we covered 212 laps over the two days thanks to Esteban Ocon and Mercedes. The work consisted of assessing a range of prototype slick tyres, as we begin to finalise next year's specification: the last season of 13-inch tyres before we move on to 18 inches in 2021."

Further trials of the 18 inch tyres will take place later in the year, with McLaren on duty in October and Mercedes in December.