Sauber has announced that Marcus Ericsson and Charles Leclerc will race for the team next season
Antonio Giovinazzi was touted to replace Ericsson but Giovinazzi will now take reserve driver duties, while Ericsson stays for a fourth successive year with Sauber.
Leclerc comes off the back of a dominant Formula 2 season during which he took seven wins on his way to the championship.
Ferrari junior Giovinazzi started the Australian and China Grands Prix for Sauber this year, having finished additional tests for Sauber in Spain and Ferrari in Bahrain. He also took part in numerous free practice sessions for Haas.
Sauber also announced its concept livery for next season as it begins its partnership with Alfa Romeo.