Budapest: A suspected hydraulics problem has cut short Daniel Ricciardo's latest practice session at the Hungarian Grand Prix.
The Australian Red Bull driver, who was fastest in practice on Friday, didn't make it through Saturday's session.
Ricciardo was forced to pull over at the 30-minute mark with a suspected hydraulics problem.
"Everything turned off," he said over the radio, with the team telling him not to change gear after he reported the car was stuck in fifth gear.
Ferrari's Formula One championship leader Sebastian Vettel smashed the absolute track record in final practice while title rival Lewis Hamilton remained off the pace.
The German, who leads Mercedes driver Hamilton by a single point ahead of the last race before the August break, lapped the Hungaroring in one minute 17.017 seconds on supersoft tyres.
The four-times world champion's time was 0.475 quicker than second placed team mate Kimi Raikkonen.
Brazilian Felipe Massa started the session, after feeling unwell on Friday and being taken to hospital, but cut it short with continuing uncertainty about whether he would be able to take part in qualifying.
Williams confirmed that the veteran had wanted to stop as he was still not feeling well.
British reserve Paul di Resta was on standby, if given the official go-ahead.
"I'm ready to pounce if he needs a stand in," the Scot told Sky Sports television.
"You're very anxious. Nervous but very excited. You go straight in the deep end. It's a tricky little track. You have to be very committed and confident."
Reuters