The incident inflicted damage to Perez’s Red Bull, with estimates suggesting a 65-point downforce loss due to floor and sidepod damage - a significant handicap that, while not ending Perez’s race, impacted his pace as Lawson swept past on the main straight.
Lawson also ended up having a disastrous Mexican GP, finishing down in 16th following a separate tussle with Franco Colapinto.
During the Perez incident, Lawson’s frustration boiled over visibly as he overtook Perez, an act that was broadcast live to millions.
Reflecting on the incident, Lawson admitted regret, explaining that his gesture was a heat-of-the-moment reaction but emphasised that it was inappropriate.
"It's obviously one of those in the moment things," Lawson told media after the race.
"He spent half the lap blocking me, trying to ruin my race, so I was upset. But it's not an excuse. I shouldn't have done it, and I apologise for that."
With Lawson the current favourite to replace Perez at Red Bull next season, the Kiwi admitted the incident was far from ideal and recognised the tension it created within the Red Bull camp.
"I don't think that's what Helmut [Marko] likes," he continued. "It’s not my character, not something you should be doing."