Lando Norris signed a contract extension with his team in May, with Sainz replaced by Daniel Ricciardo at McLaren in 2021.
Sainz and new colleague Charles Leclerc rapidly built a strong bond, and the two teamed to place Ferrari third in the constructors' standings.
Ferrari driver Carlos Sainz finished the 2021 Formula 1 season fifth in the world driver's championship, behind only the Mercedes and Red Bull drivers.
The Abu Dhabi GP saw Max Verstappen beat Lewis Hamilton to be crowned world champion in very controversial circumstances.
Verstappen won his first ever world title after a safety car right at the end of the race saw him and Hamilton race wheel to wheel in the last lap.
After crashing heavily in second practise on Friday, Leclerc admitted he was taking things "step by step" in order to rebuild his confidence.
McLaren only scored two points, allowing Ferrari to maintain their third-place position in the constructors' championship.
The Brazil GP saw Lewis Hamilton pick up an impressive win and reduce the deficit in the championship race against Max Verstappen.
The Mexican GP 2021 saw Max Verstappen establish a 19-point lead over Lewis Hamilton. Let us look at the major takeaways from the F1 race.
Ferrari's extra horsepower could be crucial in the team's bid to overtake McLaren for third place in the constructors' championship.