Lewis Hamilton has indicated that Max Verstappen's tire failure in Baku was down to the way Red Bull's tires were run and not the fault of Formula One tire supplier Pirelli.
Verstappen was kicked out of the lead of the Azerbaijan Grand Prix two weeks earlier, when his left rear tire hit more than 200 mph with five laps left.
Earlier in the race, Lance Stroll suffered a similar failure on his left-rear tire and hit a wall at high speed.
Pirelli's investigation into the failures found that there were no production or quality issues with the tyres, while Red Bull claimed that no car faults were found and that the tires were running to Pirelli's standards "at all times".
Running a lower tire pressure gives more performance than the tire itself, but Pirelli sets a mandatory minimum tire pressure before each race to prevent teams from risking the integrity of the tires with too low a pressure.
One theory behind Baku's failures is that Verstappen's tire pressures met Pirelli's parameters when the tires were mounted on the car, but did not meet Pirelli's expectations as they overheated while the car was on the track.
Ahead of this weekend's French Grand Prix, the FIA announced that additional random tire pressure checks would be introduced after each session to ensure the teams were not driving low pressure while the car was on the track.
"Wherever there's a failure, they [Pirelli] always put pressure, which lets you know something," Hamilton told a news conference in France.
"Frequently the tires are not running at the asked pressure.
"We didn't have any problems with our tyres. I think they [Pirelli] did a great job with the tires this year, they're stronger than before.
"And in this particular instance, I don't think it's Pirelli's fault."
At the same press conference, Verstappen said he was unhappy with Pirelli's explanation of the failure.
Hamilton said he was surprised the FIA needed to clarify tire pressure regulations before the French Grand Prix, but he welcomed the move.
Hamilton said, "I was very surprised, naturally, to see that he had to clear them ... which obviously you can take whatever you want from him."
"I'm glad they acknowledged that they need to clarify this, and I think what's really important from now on is how they police it, because they're not policing how to use tires." Getting done [while on the track] - tire pressure, tire temperature, and we need to do better.
"It's great that they've done a TD [technical directive], but now we need to see this in action, and be really vigilant to make sure it's on par across the region."