Sebastian Vettel said the combination of Red Bull's previously poor Monza form and the fact that his first career win had come at the same track three years ago with Toro Rosso made his Italian Grand Prix one of the most emotional of his incredible season.
"Very emotional," said Vettel. "This circuit means a lot to me and has been very special - my first win was here so when I crossed the line I remembered every single bit.
"It's unbelievable. A circuit that has been tough for us to be competitive and we came back this year and the car was amazing."
Although Vettel was racing by himself for most of the distance, he had a busy first few laps with a three-abreast moment into the first corner with Alonso and Lewis Hamilton, and then a close call with Alonso through Curva Grande as the Ferrari defended just before Vettel's successful pass.
"The start was not that good," Vettel admitted. "It took me a while to see we were three alongside going into Turn 1. Then after the restart I was able to pass [Alonso]. He didn't give me much room so I don't know if he knew I was on that side."
Red Bull had run a short top gear on Vettel's car for better acceleration out of corners at the expense of top speed - a decision that paid off as he took pole, but was felt by his rivals to be a potential weak point in the race, though Vettel said his win proved it had always been the right call.
"I don't think we took any gamble today, we took the gamble yesterday in qualifying," he said. "People saw our top speed was not very high so gears were slightly shorter, so I couldn't use the speed on the straight, but for the race we were comfortable.
"I was able to pass Fernando without DRS but even with DRS it may have been a bit comfortable. All in all we did the right thing, had a great race car and great speed all the way through."
Vettel can now clinch his second title in Singapore in a fortnight if he outscores Alonso by 13 points and Jenson Button and Mark Webber by eight points - though this came as a surprise to the champion.
"Wow! I don't know. It has been an incredible year so far to be honest, we have progressed so much as a team, got so much stronger," said Vettel.
"We'll just do Singapore as we used to do all the other races - go there and go step by step.
"I am looking forward and we'll see what happens there."