Ricciardo said of Mercedes: "I could see fuel coming out of the fuel tank, so I think they were quite heavy today".
Vettel entered the Malaysian Grand Prix weekend trailing Hamilton by 28 points at the top of the drivers' championship after retiring last time out in Singapore, but bounced back by finishing six-tenths of a second clear of the field in FP1.
"In Singapore, Sebastian was first and I was fourth in qualifying so if you compare it with Mercedes, we were better", he said.
"I know that Lewis has more to lose because he is fighting for the championship so maybe I took an extra risk but I think that was one of my only chances", he said. "It's over the whole year".
Ferrari had been looking strong, with Vettel ending Friday's opening day of practice fastest ahead of Raikkonen, before the Finn reversed the order in final practice on Saturday.Mercedes, on the other hand, had struggled.
The day after turning 20, Verstappen turned on the style, making a fine move to overtake Hamilton on lap 4. I need to take one session at a time.
The race is scheduled to be held on 29 October at the Hermanos Rodrigues circuit in the southeast of the capital, which marketing head Rodrigo Sanchez last week said sustained no damage.More news: Charlie's Angels: Kristen Stewart, Lupita Nyong'o Up for Reboot
Although Japan was an established destination in the world of F1, the introduction of the malaysian Grand Prix in 1999 heralded a new dawn in the sport.
Kimi Raikkonen had qualified second with Vettel sidelined but he could not even make the start this time around as a battery issue meant he was left in the garage.
"It's not ideal, not what you want when you think you've got it in you".
Red Bull team principal Christian Horner was confident the issue would be taken care of.
"I genuinely have always had support from all of my team, I have never had any complaints from them and I don't anticipate there to be moving forward". "So we shall see tomorrow whether that is still the case - but I think we made some changes going into qualifying that should suit the auto better for tomorrow, so I'm hopefully that we will be there or thereabouts". "For me, F1 is all about speed, loud sound and unpredictable results, and Sepang is well known for its toughness and challenging weather", said Rajamohan, who is involved in the book and stationary business.
"Fridays are when you play around and try some things", Vettel said. "We only have 12 hours to get it right".