Sainz and new colleague Charles Leclerc rapidly built a strong bond, and the two teamed to place Ferrari third in the constructors' standings.
Schumacher has been appointed as Ferrari’s reserve driver for 2022, the Italian team eager to one day see the young German compete for them.
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.
Ferrari overcame McLaren to third place in the final standings by 47.5 points, despite the early finish to its upgrade cycle.
Kimi Raikkonen and Fernando Alonso were teammates at Ferrari for just one season in 2014, with the Spaniard outpacing the Finn comfortably.
Ferrari and McLaren fought a long battle for third in the constructors’ championship behind Red Bull and eventual winners Mercedes.
Hamilton has not yet spoken in public about the circumstances in which he lost an eighth world championship.
Despite McLaren's disappointing end to 2021, Lando Norris believes the skirmishes with Ferrari along the way were beneficial to both teams.
The Abu Dhabi GP saw Max Verstappen beat Lewis Hamilton to be crowned world champion in very controversial circumstances.
After crashing heavily in second practise on Friday, Leclerc admitted he was taking things "step by step" in order to rebuild his confidence.