Wolff: Unfinished business as we head to São Paulo

In Mexico Hamilton's fourth place was good enough to claim the title, but on the day Ferrari were the better team as both cars finished ahead of the silver ones on a weekend in which neither of their drivers could find the sweetspot around Autodromo Hermanos Rodriguez.

Lost amid the jubilation of Hamilton's title glory was the fact that Mercedes were out of sorts in Mexico and although they head the standings by 55 points, there is still work to do if they want to make it ten titles in five years.

Ferrari, on the other hand, have narrowed the lead in the past two races and appear to have returned their car to a winning force after it was discovered that their updates had not been working, prompting them to return to a more competitive earlier version of the car. And with it they may have a slight edge again, Interlagos will reveal all.

Speaking ahead of the weekend at Interlagos, Wolff said, "Mexico was a bittersweet weekend. On the one hand, we're extremely happy for Lewis. He is the best driver of his generation and his fifth Formula 1 World Championship puts him among the absolute greatest this sport has ever seen."

"On the other hand, we cannot be satisfied with our race performance in Mexico. Qualifying looked promising but just a few laps into the race, we knew that we'd run into big issues with the tyres."

"We started to analyse those problems immediately after the race and have made progress with understanding the challenges we faced and why. It's important to apply all our learnings to make sure we come back strong in Brazil."

"Our target for this season was to win both Championships, not one title or the other, so our mindset is one of unfinished business as we head to São Paulo," continued Wolff.

"We have a big battle on our hands for the Constructors' title and we have lost ground to Ferrari in each of the past race weekends - even though we had the base performance to do better. This is the moment to keep our feet on the ground, focus clearly on the objective and trust in our processes and people to deliver."

"In the cockpit, I know that both Lewis and Valtteri are determined to end their respective seasons on a high note; as a team, we are aiming to finish this year with our heads held high and with two performances that properly reflect the level of performance we have attained this year," added the Mercedes team chief.