Robert Kubica, who was driving a current F1 car for the first time since 2011 when a rallying crash break up his F1 career, successively set 142 laps and posted the fourth fastest lap-time at the Hungaroring on Wednesday.
Now, the eyes of the F1 world watching the former Renault and BMW driver.
“Hungary is one of the toughest circuits,” said Red Bull boss Christian Horner. “If you can drive here, you can drive anywhere.
“He seems absolutely committed and firmly convinced about his comeback,” he added.
Photographers zoomed in on Kubica’s permanently injured right arm on Tuesday, Kubica got FIA clearance to drive by passing the five-second cockpit evacuation test.
“I’m really happy that Robert is getting this opportunity and I’ll keep an eye on how he goes,” said Lewis Hamilton.
“It would be great if he was able to come back. He is one of the most natural talents and fastest drivers I have ever driven against, and if he was able to continue, he probably would have been champion,” he added.
Max Verstappen, who was just a boy when Kubica last raced in F1, said: “I’ve heard a lot about Robert, that he was a fighter and above all very fast.
“I think all of us drivers wish him well. But some fast laps are different to 70 (laps), and only Robert can judge the situation after the test,” he added.
Following the testing, Renault admitted “driver evaluation” was part of its programme during day two of the test, which will be vital in weighing up whether Kubica can make a proper return to F1 next season.
“Yes [I’m happy] but not 100 per cent happy,” Kubica told reporters. “The biggest difference is this car has nothing similar or same as the cars I have been testing lately.
“When you have so many things that are different, it normally takes a bit of time to adapt.
“Hungary we know it’s a difficult track, one of the most physical tracks. Coming here, actually Nico Hulkenberg said the same – that once I will be able to drive here, probably I’ll be able to drive everywhere.
“You can predict it wasn’t easy, which I’m not hiding, but it was good. In the end we have done over 140 laps and I could drive I think tomorrow easily, so fitness level is good, which is a good sign.
“There are sides which need to be improved or need to get better, but it’s always like this.”
“From a physical point of view, inside the car it is much better than it looks outside the car,” he added. “That’s what’s most important. I didn’t have any pain, I actually feel quite well.
“Of course, I’m tired. It has been a hot day in the end the eight hours of running, I jumped out only once for 10 minutes.”
The Polish man said one of the main transformations he noticed in driving the 2017 F1 car was the extra weight compared to earlier generations of F1 car.
“When I last time drove the car the minimum weight was 620kg, [so] to have 100kg [extra] bringing around the track, it makes a big difference,” he added.
“In a rally car when you put a 20kg spare wheel in a car which is weighing 1,300kg you feel it, so imagine in a 600kg car adding 100kg.”
“To be honest I don’t remember even what times they were doing on race weekend here,” Kubica added.
“Most of the job was done to evaluate some parts for the team. “It was not an easy day, but I think we have done a good job.”