The Australian clocked a quickest time of 1:40.852 in P2, 0.556 seconds ahead of team-mate Max Verstappen in second, while Mercedes star Lewis Hamilton was nearly a second slower than the early pacesetter in third.
Vettel is likely to be more of a threat in qualifying today after enduring a frustrating time in second practice, the German finishing 11th after having his best run blocked before giving the barrier a whack.
"This is a good day, but it's important that we do it tomorrow and Sunday, those are the days that count", said Ricciardo, who set a track record of 1min 40.852sec in second practice.
"We got it, another step, I think we can get another half a step out of it, that's what I'm looking for". "We've fortunately got one this year", he said.
Ricciardo is therefore confident that an ever-improving Red Bull outfit will be able to make it a three-way fight this weekend.
Singapore is like Monaco and Hungary in that it is a hard-braking circuit which is tough to overtake on and more suited to Ferrari and Red Bull than Mercedes. "But nothing is out of reach".
How title rivals Lewis Hamilton and Sebastian Vettel have fared in each race this season.
One Republic performs on the Padang Stage in Singapore. Mark Kolbe Singapore GP via Getty Images
This weekend's race could prove to be the only course of the remaining seven grands prix where Ferrari will hold the advantage over Hamilton and his Mercedes team.
Kimi Raikkonen would only manage ninth on a used set of ultrasofts when he went out, but Vettel would not go for a similar run in this session.
"I said the Ferrari could be a problem, and now it's Red Bull", Mercedes non-executive chairman Niki Lauda told Sky Sports television.
After a disastrous start to the season with a non-finish in Melbourne, Ricciardo has rebuilt his confidence and is happy with Red Bull's progress.
Renault-bound Carlo Sainz Jr, who struggled with understeer on his long runs, was the leading Toro Rosso, almost fourth tenths quicker than team-mate Daniil Kvyat, in 12th. "For some reason Ferrari are slower, I don't know why".
Nico Hulkenberg went an impressive fifth-fastest for Renault, ahead of McLaren pair Stoffel Vandoorne and Fernando Alonso.
McLaren have confirmed they will ditch Honda at the end of the season after a disastrous three years being powered by the Japanese giant. The British-based team will switch to Renault next year, with Honda moving to Red Bull-owned Toro Rosso.
More than 80 percent in Florida have power back
Officials are holding daily calls with those facilities to make sure they have everything they need to care for their residents. The eight elderly patients who died at a Broward County nursing home have not yet been included in the death toll.
In 2013 it recalled the Vatican's then ambassador to the Dominican Republic following allegations that he sexually abused minors. After he was defrocked, Wesolowski lost his diplomatic immunity and the Vatican said he could be tried by other courts.
The Treasury Department also said Thursday that Mnuchin requested a government plane so he could access secure communications. The Treasury Secretary said: "I probably spend around 50 per cent of my time on national security issues".
Yesterday, talking to reporters aboard Air Force One, Trump apparently thought it'd be a good idea to bring all of this up again . On Wednesday, Trump met in the White House with Senator Tim Scott of SC , the only black Republican in the Senate.
It's unclear why Jenkins went to the basement, but relatives said police told them she appeared to be inebriated. Holmes also told the station that Jenkins appeared to be lost as she stumbled and tried to open several doors.
But when BuzzFeed News spoke with them before the election , both she and her father said they did not support Donald Trump . Weiner ran for mayor of New York City in 2013, a bid scuttled by a similar sexting scandal.
This storm grew so immensely powerful over warmer-than-normal Atlantic water that it devastated the first islands in its path. The deaths happened at the Rehabilitation Center at Hollywood Hills at 1200 N. 35th Avenue, Hollywood police officials said.
Arsenal have pledged to conduct a full investigation into the events before and during the game and claim that many tickets were obtained through third party sales rather than directly through official channels.
He replied: "That's what I do: Because I like boobs and the First Amendment, which is exactly what I said". Travis rehashed the line a few times, never completely clearing up the expectation behind his announcement.
A computer screen in mission control displays mission elapsed time for Cassini minutes after the end of mission. The spacecraft tumbled out of control while plummeting at more than 76,000 miles per hour (122,000 kph).
But the reigning champions endured an uncharacteristically off-colour weekend in 2015, when Vettel won for Ferrari instead. McLaren have endured a miserable year, and are last but one in the constructors' championship.
White House press secretary Sarah Sanders originally read Frank's letter during a press briefing in early August. The young entrepreneur normally charges $8 per lawn, but he made a decision to give the White House a freebie.
Chinese bitcoin exchange announces end to trading
The cost of the bitcoin declined to 26,400 Yuan (almost to $4,029) on BTC China this week compared to 32,500 Yuan of last week. Levitt said he would avoid investing directly in bitcoin due to its wild price fluctuations that are "hard to understand".
Jose expected to churn ocean along New Jersey shore
The hurricane center also says "a tropical storm watch may be needed for a portion of the North Carolina coast tomorrow". The coast will see some higher surf, unsafe rip currents and possiblly some rain Sunday, Monday and Tuesday.
Jon Jones : Stripped again from his title
Cormier lost the belt to Jones in a third-round stoppage at UFC 214 in Anaheim, California. Whatever the ultimate verdict, Cormier wants his followers to respect Jones.
McMaster Defends Trump Speculating On London Subway Bombing
Police say several people have been injured in the rush-hour incident on a Tube train at Parsons Green station in west London . Trump said the attack was carried out by "a loser terrorist" and urged the U.S.to be proactive in combating terrorism.