Carlos Sainz thinks Pirelli should scrap its planned new tyres for 2020.
The drivers got their first taste of the 2020 tyres in practice in Austin, but the new specification - designed to minimise overheating - was almost universally unpopular.
"The tyres for this season were I think a step forward. The behaviour is better than last year," McLaren driver Sainz said in Brazil.
"But I did not like what I tried for 2020. I am a driver and I have the right to criticise something that I do not like."
Sainz also got an early taste of Pirelli's new 18 inch tyres for 2021 at a test last week at Paul Ricard.
"I can't comment about that as it was a confidential test, but the test went relatively well," said the Spaniard.
"But for next year, I would propose that we use the tyres that we have now."
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