Alfa Romeo's partnership with Sauber will end once the 2023 season has been completed.
The Italian manufacturer first partnered with Sauber in 2018 as a title sponsor, before the team were rebadged as Alfa Romeo Racing the following year.
Even though it was primarily a sponsorship agreement, through a link-up with Alfa's parent company Stellantis, there has been some technological assistance benefitting Alfa Romeo's road car division.
The news comes after Audi announced they will join the F1 grid as a power unit supplier from 2026.
Though Audi have not yet revealed which team they plan to partner with, they have been heavily linked with Sauber, whose Hinwil headquarters are 400km away from Audi Sport's Neuburg facility.
Additionally, current Audi CEO Markus Duesmann was Head of Development at Sauber between 2007 and 2009, when the Swiss outfit were partnered with BMW.
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Alfa Romeo to evaluate future in F1
Alfa Romeo say they will evaluate their future in F1 as the brand enter the final 18 months of the partnership with Sauber.
The company have enjoyed an uptick in performance so far in 2022, with their team having signed an all-new driver line-up of Valtteri Bottas and Zhou Guanyu.
Alfa currently sit sixth in the Constructor's Championship after 13 rounds of the season.
In a statement, Alfa Romeo added: "Since the economic and industrial turnaround of the brand will be achieved in 2022, Alfa Romeo will now evaluate among the many opportunities on the table, and decide which will be the best one to sustain the long term strategy and the positioning of the brand."
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