Pierre Gasly was thrilled with his day's work after completing a tremendous 147 laps in the Toro Rosso-Honda on the final day of the first test in Barcelona.
Having managed to work through numerous programmes and help the team continue to understand the STR13 with still four days of testing to run, the Frenchman is confident the team can make the improvements needed ahead of the first race.
"I think it's really satisfying to have done so many laps," Gasly said. "It's only the second day for me testing in the car, fourth day for the team, so we're still learning many things about the car.
"We'll have to go through everything in the coming days before the second test, but it was a really positive day overall."
"At the moment we're just testing different things. I would say the first feeling with the car, it's pretty positive. At the moment we still need to improve a couple of things, but about the chassis, we're pretty happy, about the engine same thing.
"We just need to go through all the data, all the testing we have done. We should have a couple of upgrades for next week as well, so it's the same process. We're trying to improve the car day by day, but at the moment we're looking at some good improvements."
With no reported issues so far from the team regarding the new Honda power unit, Gasly was happy to prove the relationship between the Japanese manufacturer and Toro Rosso is working well and will continue to improve as the year goes on.
He added: "I think today we have shown that the engine is fine. Toro Rosso is working really hard with Honda in terms of communication to have the best package possible.
"We have a common target. We are working as a team altogether, not as two different teams. I think it's something really positive.
"We still need to improve a lot. There are still a few things we need to improve, I guess like every team. But so far, it's been great working with them.
"They are pushing really hard. That is always nice."
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