Sebastian Vettel thinks it is a matter of "when" and not "if" Red Bull joins the battle for race wins this season.
After four rounds, Vettel leads the drivers' championship by 13 points after taking two wins and two second place finishes for Ferrari. Mercedes has secured the other two victories, with Lewis Hamilton winning in China and Valtteri Bottas scoring his maiden victory in Russia on Sunday.
Typically Red Bull has been over a second off the pace in qualifying and, with the exception of China, has had to settle for being the best of the rest in races.