Rainier Ehrhardt - Photo Editor
Compared to Sauber's 2012 lineup, Hulkenberg and 21-year-old Gutierrez have 60 Grands Prix less experience than departing team drivers Kamui Kobayashi and Sergio Perez.
Reports have mentioned Nico Hulkenberg as a possible contender for struggling Massa's cockpit alongside Fernando Alonso.
Berthold Bouman, F1 correspondent
Pedro de la Rosa is more willing to pick a favourite between Alonso, Vettel and Raikkonen.