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Helmut Marko says Red Bull have discovered the cause of Max Verstappen’s latest retirement but refused to go into details.

Verstappen was on course for a solid but not spectacular runner-up result at the Australian Grand Prix, the Red Bull driver unable to stick with race leader Charles Leclerc but maintaining a healthy advantage over P3.

And then disaster struck.

For the second time this season the Red Bull driver suffered a fuel pressure problem, his RB18 slowing before stopping on the side of the track.

Although pundits speculated that it was an engine-related issue, Red Bull team boss Christian Horner was quick to deny this but did not give a cause for the latest breakdown.

Marko, Red Bull’s motorsport advisor, has now revealed that it was a fuel leak that led to the driver’s DNF.

“We were able to clarify the cause of the fuel leak in Max’s car,” he told Speedweek.

The Austrian, though, would not go into details as to what led to the leak.

“The matter is very complex,” he said, adding that “the problem is absolutely different from that of Bahrain.”

In Bahrain, the problem with the Red Bull fuel system turned out to a lack of fuel pressure caused by a vacuum that prevented the pumps from drawing fuel and delivering it to the engine.

Losing a hatful of points with his two DNFs, Verstappen is down in sixth place in the Drivers’ Championship with the Dutchman conceding it won’t be easy beating