"But I think the gaps between us are getting smaller, so let's see how we get on this year", said Vettel.
It's unlikely that Hamilton will get the job done in Mexico, however, because even if the Englishman wins the race with a point for the fastest lap, second or third for Bottas would take the title race on to Austin, Texas.
Lewis Hamilton (R) of Great Britain and Mercedes GP and third-placed Sebastian Vettel of Germany and Ferrari look on, on the podium during the Formula One Grand Prix of Russian Federation at Sochi Autodrom, Sept. 30, 2018.
Ferrari have been faster than anyone over a single lap and on the straights.
"I'm hoping for a better weekend but I think it's going to be very hard to beat the Ferraris with those long straights".
"However, the Briton has predicted that the title race won't end in Mexico".
"I don't anticipate it will be Mexico".
"The weather could be a bit hard this weekend, so we see what happens".
"There is no sense of entitlement in this team for future success, so we were quickly back to our usual race preparation routine after Japan", added Mercedes team boss, Toto Wolff.
He told Sky Sports when asked why his side have struggled at times so far this season: "We brought updates and others did too and I guess we didn't make that performance step like we did a year ago compared to them".
The Mercedes team boss added: "The high altitude of the track brings some fairly unusual challenges as the low air density affects the downforce of the vehicle, the cooling and the engine performance". "We race at such a high altitude and all the teams try to put as much downforce on the auto as possible".
Ferrari arrived in Mexico as many people's favourites, having racked up five poles in a row, with Red Bull also seen as contenders for another win.
Turning Mexico MAX-ico since 2017!
"I really enjoy driving there, especially because the walls are quite close and this is something I like as a driver".
"Valtteri's driven well all year long, he's done a great job today and he will most likely do a very very solid job these next races, so we still have a battle, the fight continues".