Three drivers? James Allen explains what is going on at Sauber

BBC Formula 1 correspondent and lead commentator for BBC Radio 5 live, James Allen, explains what is going on at Sauber, who have failed to overturn a court ruling that asserts that Giedo van der Garde must race for the team at Sunday's Australian Grand Prix.

Van der Garde, 29, a former test driver for Sauber, says he was promised a race seat for this season, a claim backed by the Victoria Supreme Court this week.

Marcus Ericsson and Felipe Nasr are the team's nominated drivers for 2015.

Australian Grand Prix coverage details.

Available to UK users only.

BBC Sport
Formula 1