Red Bull motorsport advisor Helmut Marko feels the pressure from his team was behind Lewis Hamilton's engine failure in Malaysia.
Hamilton was in the lead at the Sepang International Circuit but was forced to retire on lap 41 as mechanical issues dogged the two-time defending champion once again.
The British flyer has now fallen 23 points behind Mercedes team-mate Nico Rosberg at the top of the drivers' standings with just five races to go.
But it was the Red Bull duo of Daniel Ricciardo and Max Verstappen who finished one-two on Sunday and Marko is adamant Hamilton's problems can be put down to the way the Red Bull duo pressurised the leader.
"We clearly had the upper hand - my guess is that we very likely forced Hamilton into that engine failure," he told the official Formula 1 website. "We permanently put pressure on him, challenging his lead, as he knew he had to create a gap.
"To go permanently full throttle was probably not the best thing for his engine."