Postpublished at 16:29 British Summer Time 27 May 2018
Andrew Benson
BBC Sport’s chief F1 writer
Ricciardo says he lost the MGU-K - that's at least 160bhp gone from about lap 18. Actually more like 225bhp. Apologies. Horner says 25% engine power.
Ricciardo wins despite loss of power; Red Bull team-mate Verstappen ninth after starting at back
Vettel and Hamilton second and third
Hamilton now leads championship by 14 points from Vettel
Leclerc suffers brake failure and slams into back of Hartley on lap 72
Alonso retires with gearbox issue
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Michael Emons
Andrew Benson
BBC Sport’s chief F1 writer
Ricciardo says he lost the MGU-K - that's at least 160bhp gone from about lap 18. Actually more like 225bhp. Apologies. Horner says 25% engine power.
Red Bull team principal Christian Horner, speaking to Sky Sports: "Unbelievable. Daniel was not going to give this race up this weekend. We lost the MGUK. He just managed it like he was on a Sunday afternoon drive. They were telling me on the intercom we would have to retire in one or two laps. But we were leading at the Monaco Grand Prix, we were keeping going.
"Daniel is a big part of our team. He is the complete article now. You can hear his composure in the car, when something goes wrong there is no panic, no raising of his voice. He worked it out and I cannot praise him enough.
"He lost about 25% of the power of the engine. That then means his rear brake temperatures are going through the roof, he is having to cool the brakes, cool the car, he has to lift off to do that and he has Vettel breathing down his neck. All those things he has to manage and he was the coolest guy out there today.
"It has been a tough 24 hours for Max Versappen, he will go away and reflect on this weekend and approach Montreal in a slightly different manner."
For a lot of this race, Sebastian Vettel was within a second of Daniel Ricciardo, but the winning margin at the end is actually 7.3 seconds. Just over a second separated Lewis Hamilton in third and Kimi Raikkonen in fourth. Valtteri Bottas was less than seven tenths behind Raikkonen.
Only a second and a half separated Esteban Ocon in sixth and Max Verstappen in ninth, with Pierre Gasly and Nico Hulkenberg in the middle.
Adrian Newey, the chief technical officer at Red Bull, gets the, er, privilege, of doing a shoey - drinking some fizzy stuff from the same shoe that Daniel Ricciardo has been wearing throughout this race.
Newey may be regretting that in a few hours time.
Red Bull motorsport chief Dr Helmut Marko, when asked by Sky Sports what exactly was the issue Daniel Ricciardo had: "You won't get any details from me!
"He managed the problem and it was incredible, I don't think any other driver could do it.
"I was very nervous. In the beginning it slowed the car down but then we changed set up, changed his driving style. Unbelievable."
Nico Hulkenberg does not waste much time before getting back on Twitter..
Think this sums it up well...
Six races gone of the 2018 season. Sebastian Vettel won the first two, Daniel Ricciardo won the third one, Lewis Hamilton took the next two and now Ricciardo has taken the sixth one.
Red Bull: 1st (Ricciardo) and 9th (Verstappen)
Ferrari: 2nd (Vettel) and 4th (Raikkonen)
Mercedes: 3rd (Hamilton) and 5th (Bottas)
Force India: 6th (Ocon) and 12th (Perez)
Toro Rosso: 7th (Gasly) and DNF (Hartley)
Renault: 8th (Hulkenberg) and 10th (Sainz)
Sauber: 11th (Ericsson) and DNF (Leclerc)
Haas: 13th (Magnussen) and 15th (Grosjean)
McLaren: 14th (Vandoorne) and DNF (Alonso)
Williams: 16th (Sirotkin) and 17th (Stroll)
Daniel Ricciardo wins the Monaco GP
Lewis Hamilton, who finished third: "Firstly a big congratulations to Daniel and Red Bull, they did a great job this weekend. It would have been nice to finish second, I did everything I could. It was the least interesting race."
Daniel Ricciardo wins the Monaco GP
CJC: Daniel Ricciardo Mate! - classy drive, classy driver.
Harrison Fretwell-Bates: Congrats to Daniel! The issue wasn’t enough to stop him from taking the gold. Totally untouchable!
James Stevenson: No one can deny Daniel Ricciardo deserved that victory. What a weekend from him. P1 from Thursday to Sunday.
As James says Ricciardo was fastest in all three practice sessions, fastest in all sections of qualifying and led every single lap. Absolute dominance.
Sebastian Vettel, who finished second: "I think we had the pace but it was a tricky race and Daniel had the answers all the time. I think he had a problem with his MGUK, I started to pick up a bit but then lost a bit in my tyres."
Race winner Daniel Ricciardo says: "I think I can show more emotion than yesterday. This is two years in the making, I finally feel redemption (after coming second in 2016).
"We had problems, a lot to deal with and before halfway I felt a loss of power and thought the race was done.
"We got home using just six gears, but we got it home and I'm stoked. There were a few doubts that came in mid-race, but we won Monaco - it feels good."
Jennie Gow
BBC Radio 5 live pit-lane reporter
Daniel Ricciardo has his hands in his visor, this will be such an emotional moment for him right now.
Christian Horner is telling Daniel Ricciardo to give Prince Albert of Monaco a shoey!
Jolyon Palmer
Former Renault driver on BBC Radio 5 live
Lewis Hamilton will take third. It has been a tough weekend for Mercedes but three points lost, a long way to go this season. This is a loss Mercedes will take.
DNF - Charles Leclerc, Brendon Hartley and Fernando Alonso
Red Bull: "Amazing. I don't know how you did that, Daniel. Incredible."
"Redemption," replies Daniel Ricciardo, talking about his 2016 race where he came second after he lost the lead because of a botched pit stop.
From pole to chequered flag. Masterful from Daniel Ricciardo. He wins the Monaco Grand Prix.
Sebastian Vettel second, Lewis Hamilton third, Kimi Raikkonen in fourth holds off Valtteri Bottas.
Jennie Gow
BBC Radio 5 live pit-lane reporter
Hamilton will be on 110 points if it finishes like this, Vettel on 96 and Ricciardo on 72.