Adrian Sutil signed by Sauber for 2014 season . Germany 's Sutil has spent his F1 career with Force India . Comment: Second Sauber driver still to be named .
Adrian Sutil signed by Sauber for 2014 season . Germany 's Sutil has spent his F1 career with Force India . Finished 13th in last season 's driver standings . Second Sauber driver still to be named .