RED Bull Racing's outspoken adviser Dr Helmut Marko has indicated Mark Webber will be expected to play a supporting role to Sebastian Vettel as the German bids to make it four world titles in a row in 2013.
Vettel clinched a third straight title in thrilling fashion at the final race in Brazil in November, having won five grands prix over the course of the campaign.
Although Red Bull insist both men have equal standing and are free to race each other, Marko said Webber was aware of where he stood heading into the new season.
"Mark knows what we expect of him," Marko told German newspaper Sport Bild.
"For four years, Vettel and Webber have driven together in our team. Sebastian was runner-up once and champion three times.
"The statistic speaks for itself. There is no reason to think the balance of power will change."