Lewis Hamilton heads into the Monaco Grand Prix - which former world champion Nico Rosberg has called "the most hard race of the year" - atop the rankings after his win in Barcelona earlier this month.
Ricciardo has now jumped Mercedes Valtteri Bottas to move into third in the drivers' standings, 24 points behind Vettel and 38 behind Hamilton. "There's a lot more work still to be done, but we head to Canada feeling confident that we're headed in the right direction".
"We were very nervous because in the beginning it looked like it could even the vehicle further but then we changed the set up, changed his driving style so unbelievable".
All three men have won twice this season.
There have been speculations that Ferrari are mulling over roping in either Daniel Ricciardo, Sauber rookie Charles Leclerc or Mercedes star Lewis Hamilton as a replacement for Raikonnen for next year.
"There needs to be quite a massive mistake to get past".
"OK mate, we can see what's going on", his race engineer replied after a pause.
Red Bull's Daniel Ricciardo says he reached the finish of the Monaco Grand Prix by using just six gears, having suffered an "extreme" loss of power en route to victory. Carlos Sainz took the final point on offer in the second Renault.
Vettel conceded he didn't have the package to take it to Ricciardo.
Webber has rebuffed Vettel’s claims that he would welcome Hamilton
"It's frustrating with such a fast vehicle not to have both cars on the front row of the grid".
Starting on pole, Ricciardo retained the lead after the one and only round of pit stops - but then a power issue crept in.
Hamilton stopped as early as lap 12 and had to manage a set of ultrasofts for the remaining 66 laps.
"Will it get better?" enquired the Australian.
"There is a respect when one of many drivers does higher than the opposite and it isn't essentially at all times the identical when it is completely different characters", mentioned Hamilton, "so it is actually depending on the characters you are with". It was yet another mistake from the Kiwi in what is becoming a run of missed opportunities for the Le Mans victor.
Red Bull motorsport advisor Helmut Marko added: "It was a serious problem and he managed it".
"I think Adrian [Newey] said it was about Lap 18 we had problems", said Ricciardo.
"I personally love it and it is challenging me more than I can express".
The Australian was fastest in 2016 qualifying but lost out in the race to Hamilton. "But we got it home". "I'm pumped, it's been a good few days". Thanks everyone for the support. I think it was quite boring without a safety vehicle or anything.
"I think if Bernie was still here, he would have him at Ferrari with Sebastian".