It all depends on how the race develops for Max and if the race develops unsuccessfully for Verstappen, then Perez has chances to win on the home track. Another question is that in addition to Verstappen, there are Hamilton and Bottas, as well as McLarens and Ferraris, who, firstly, clearly do not want to let Perez and Verstappen arrange an inter-fight between themselves, and secondly, they also want to take a place above Perez. But all this cannot cancel out the fact that Perez will be set up in a special way at the Mexican Grand Prix at home in front of his fans and will try to squeeze the most out of himself and even a little more for this
Well, it all depends on how the race turns out in the ending parts. If Max is ahead of others and Perez as well, Perez won't be trying tow-in rather he will try to hold off the other drivers but if some situation arrives where Max is lagging far behind and Perez has the chance to try to go for the win, he will then eventually try that. So it all comes down to the situation of the track.