Lewis Hamilton cruised to his seventh win of the season at the Italian Grand Prix on Sunday, and nearly doubled his Formula One lead over Mercedes teammate Nico Rosberg, whose engine caught fire with two laps remaining.
About 3 1/2 hours after taking the checkered flag, Hamilton's victory was confirmed following a tire pressure inquiry.
Hamilton's left rear tire pressure was found to be 0.3 psi below the minimum of 19.5 when measured before the race. But stewards decided to take no action because they determined that the pressure was at the correct level when the tires were fitted to the car.
"I wasn't aware of it," Hamilton said, adding that 0.3 psi "is not really a huge amount on one tire."
Sole tire supplier Pirelli, still recovering from the Belgian GP two weeks ago where there were frightening tire deterioration problems, agreed with the stewards' decision.
"We are totally sure no one is cheating," Pirelli spokesman Roberto Boccafogli said, adding that "0.3 psi is nothing. … Such a small thing."
Otherwise, it was a golden weekend for Hamilton, who topped every practice, started from pole position and led the race from start to finish.
"I don't know if I've ever had a weekend like this," said Hamilton, who is aiming for his second straight F1 title and third over all.
A potential challenge from Ferrari fizzled when Kimi Raikkonen stalled on the front row of the starting grid.
In perfect conditions, Hamilton finished 25 seconds ahead of Sebastian Vettel in the other Ferrari, while Felipe Massa crossed third, 47 seconds back.
Massa finished just three tenths of a second ahead of Williams teammate Valtteri Bottas.
Hamilton now leads Rosberg by 53 points with seven races remaining this season.
With the 40th win of his career, Hamilton moved within one victory of his childhood idol, Ayrton Senna, and Vettel on the career list. The Briton also became the first driver to secure back-to-back wins at Monza since Damon Hill in 1993-94.
F1 now heads to Asia for races in Singapore and Japan. The season ends in Abu Dhabi on Nov. 29.