A long-time member of the BMW-Sauber board has resigned, according to Swiss reports.
Oswald Grubel's tenure dates back to his involvement with the sponsor Credit Suisse prior to the BMW takeover.
The German businessman, who would not comment on the reports, is now CEO of the global financial services company UBS.
Force India retains Sutil, Liuzzi
Alonso works hard to win Ferrari 'confidence'
Canada GP return to be announced on Friday
Ecclestone denies reviving Donington GP bid
Toro Rosso seat for Hartley possible - brother
American investors to rescue Sauber - report
Conway, Ericsson to test for Brawn at Jerez
Hamilton not worried by McLaren-Mercedes split
Wolff reveals rejected Williams investors
Kimi may struggle to return from sabbatical - Prost
