Lewis Hamilton and Nico Rosberg completed a Mercedes four at the Australian Grand Prix in Melbourne . Red Bull chief Christian Horner warns dominance is unhealthy , despite his team winning one-two consecutive titles themselves . Hollywood actor Arnold Schwarzenegger interviewed podium finishers .
Lewis Hamilton and Nico Rosberg completed a Mercedes one-two at the Australian Grand Prix in Melbourne . Red Bull chief Christian Horner warns dominance is unhealthy , despite his team winning four consecutive titles themselves . Hollywood actor Arnold Schwarzenegger interviewed podium finishers .