Vettel is 17 points adrift of Hamilton in the standings with eight rounds remaining and can expect Raikkonen to give him every assistance when race day comes.
Hamilton swooped to victory to record his fifth Italian win in eight years, equalling Michael Schumacher's record at the track.
With Kimi Raikkonen leading, Hamilton attempted to overtake Vettel around the outside of the second chicane on the opening lap, and light contact between the two resulted in the German spinning on the inside. Whilst the negativity is never great, that's what powered me along.
"But I'm sure it's a comment that was done in the heat of the moment". It's pretty much the same move that Kimi did to me (after a restart following a safety vehicle period triggered by the incident).
While Vettel looked to be to blame for his own misfortune, he pointed the finger at Hamilton who had seen his chance and seized it in a move that could be crucial to the championship outcome.
While Martin Brundle viewed the incident as a "50-50 racing incident", the Sky F1 pundit later concluded in the wake of Hamilton's victory: "That was the key moment of the race".
"It's not like if there's another auto, you say yeah, I'm going to make contact". "I do not think we need big changes".
The 1996 champion Damon Hill said the German had "cracked under pressure".
"He didn't leave me any space".
"We didn't expect that, we expected a much more challenging situation but the auto felt good, we managed to get a good tow throughout qualifying and that helped us", said the teenager.
Raikkonen pitted from the lead at the end of lap 20 and came out fourth, behind Hamilton, his Mercedes teammate Bottas and Verstappen.
Hamilton was also helped considerably by team mate Valtteri Bottas, who eked out his tyres before pitting to hold up Raikkonen and help the eventual victor close the gap. "Then I was the one who spun around, which was ironic".
"[It] didn't help to be behind the other cars for some laps, and it wasn't really like you can save an bad lot of tyres, you are not in a position to start saving and taking it easy - well you can, but you let him [Hamilton] past", he said.
Montreal's Lance Stroll finished 10th.