It was a record-increasing 82nd pole for Hamilton, who has won only once in Brazil, in 2016, and the first time he has taken a pole position in any races after he has won the championship.
Speaking after qualifying, Hamilton said Sirotkin's unexpected pace from behind made him think he was on a flying lap, and it was merely unfortunate they both moved in the same direction.
It wasn't all plain sailing for Hamilton, however, with the British driver twice encountering issues with traffic, once with Ferrari's Kimi Raikkonen, while in a frightening second incident, Hamilton desperately tried to get out of the path of the hard-charging Williams of Sergey Sirotkin, the pair narrowly avoiding a nasty coming-together.
Hamilton's Mercedes team-mate Valtteri Bottas, who was the previous record holder with his lap for pole position a year ago, was third-quickest ahead of Sauber-bound fellow-Finn Kimi Raikkonen in the second Ferrari. "They shouldn't call us like that".
"I'm sure we're going to talk about it in Abu Dhabi now but we might have to try and add something in like you can only be called if you have set a lap".
"However, we are actually quite even in terms of the overall year performance with Ferrari... so I'm excited to just have a battle, you know".
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With two races remaining on the 2018 schedule, a maximum of 86 points are on the table for each team, as race victories are worth 25 points and second place finishes are worth 18 points. Yesterday we had to do a lot of work overnight and again, the team were really faultless with their efforts so I was so happy when I came across on that first lap.
In the end, the wet weather stayed away, and Hamilton did what he always seems to do, pulling a lap out of nowhere to claim his 10th pole of the season when it was Ferrari and Sebastian Vettel who seemed to hold the advantage. "I think it's unfair if somebody is pulled in. I think it depends a lot more on the job that you do at the start, to get everything right then a little bit of difference on the tyres".
"Yes, I definitely don't want to win if it's given to me", he said.
Ricciardo, however, will start five positions behind because of a penalty after his team had to replace his turbocharger for the sixth time this season.
He said, however, that it was still tough to find time to switch off and recover.
"Ferrari have been incredibly quick and a lot of work has gone on from my engineers to make sure we have the auto in the bets place we could".