Carlos Sainz Jnr revealed he couldn’t see it had started to rain during yesterday’s test because the Halo prevented the drops from landing on his visor.

“Today when it was starting raining a bit, the rain, you couldn’t see it on the visor,” said Sainz at the end of yesterday’s test. “The Halo was not allowing the rain drops to go onto the visor.

“So you were not really seeing if it was raining or not. You were just feeling it in your hands, in your ass to see how the grip was.”

This is likely to be more of a problem in light rain conditions, as Sainz explained. “This kind of rain sometimes as drivers it really bothers us because you don’t know if you can actually push 100% or not.”

“You have to guess it with the pit wall and see how much rain there was because for us. Our visor was completely dry and outside it was raining. So a bit tricky there.”

However Sainz said visibility was “not an issue” on the whole with the Halo. “After two laps you don’t see it any more you just see through it.”

Sainz ended the day sixth-quickest overall while team mate Nico Hulkenberg set the fourth-fastest time.

F1 Fanatic is covering this week’s test at the Circuit de Catalunya live from the track. Follow our coverage here

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2018 F1 season