We've not seen a wet race in Singapore until now, but the heavens opened above the Marina Bay track just as the race was about to start. With a mix of intermediate and full wet tyres on the grid, there was only ever going to be chaos into the first corner - and that's just what we got. The first half of the race was fascinating, the second half lost quite a lot of the tension that had been built up, but all in all it feels like this was a crucial point of the 2017 championship campaign.
If you missed any of the action, or want a quick reminder of who retired on which lap, then read on for full coverage of the Singapore Grand Prix as it happened.
As it happened: Singapore 2017 - The race
Event Highlights
Lewis Hamilton wins after inheriting lead on the initial lap.
First corner crash between Verstappen, Vettel and Räikkönen knocks all three out of the race.
Fernando Alonso picks up damage and retires, as Kvyat and Ericsson both cause safety cars.
Daniel Ricciardo chases Hamilton but settles for second place, with Bottas third.
Jolyon Palmer picked up his first points of the year, with Sainz finishing an epic fourth.
Hi F1 friends, how's it going? Are you settling in for the long haul? Because this is Singapore and it can push the two hour mark, with a long lap and slower lap times. Plus, there's rain in the air!
On offer today, the softest of the Pirelli compounds, and one-stop races are expected. Although if wet tyres are required than strategies go completely out the window.
Qualifying yesterday provided some interesting moments, particularly as it became obvious that Red Bull's pace was enduring throughout whilst Mercedes seemed to be off the mark a little. It was Sebastian Vettel that snatched pole though, and the way he screamed his way through the cool down lap suggests he was very excited about it.
There's a high chance of the safety car making an appearance today, as it often does. We've seen drivers struggling to stay away from those magnetic barriers through all the sessions so far, and the pressure of the race might only make that situation worse.
With just three points between Vettel and Hamilton at the top of the championship table, there's every chance that Sebastian could snatch back his lead in the title fight today. Particularly as Mercedes are starting further back on the grid, and overtaking around Singapore is tough.
Unlike at the last race, where the starting grid was muddled up by a whole raft of confusing engine related penalties, there's just one driver suffering a grid drop so far today. Marcus Ericsson has a gearbox related five place drop, but he was at the rear of the pack anyway.
Sergio Pérez will have a bit of a boost today, it being announced just this morning that he will continue to race for Force India for another season in 2018. That goes with Bottas' contract extension earlier this week, as well as the whole McLaren-Honda-Toro Rosso-Renault-Sainz situation, that I'm sure you heard about.
In fact, the only person on the grid who may be feeling less than motivated at the moment is Jolyon Palmer, who is facing unemployment at the end of this season, if not before.
Tweet from @andrewbensonf1: A real journey into the unknown, this. Has never been rain in the race in Singapore. What's track like? Do the lights create glare? Etc
Tweet from @pirellisport: About to start @F1NightRace and it’s raining. All those carefully constructed strategies can now be thrown out of the window.
Williams had a really difficult qualifying session, with both drivers dropping out in Q1. Massa starts 17th and Stroll 18th, and it's going to be hard work for them to make any progress through the field.
The top six drivers are starting on the green intermediates, with Hülkenberg, and the two McLarens following them on full wets. A real mix of strategies there.
So Verstappen's slow start allowed Räikkönen to move alongside, but Vettel squeezed the Red Bull into Kimi, which caused significant damage to both cars.
Tweet from @MercedesAMGF1: We did NOT expect to be leading now! Big commiserations to the Red Bull and Ferrari crews, no one wants to go out like that!
Jolyon Palmer gets a good restart, making the most of his full wet tyres to sweep past Valtteri Bottas for fifth place. The Mercedes is on the intermediates.
Hamilton edges away from Ricciardo in P1, he has the benefit of no spray but of course is the first to discover the condition of the track through each corner.
Fernando Alonso is just drifting backwards through the field, and he gets the call that they will, indeed, be retiring the car. Not a surprise considering the sizeable bump it got on the first lap.
Out front, Hamilton is setting fastest lap after fastest lap, but with the track drying up and conditions improving, that's only going to continue to improve as time ticks on.
Sebastian Vettel: "I had an average start, moved slightly to the left trying to fend off Max, the next thing I get a bump in the side, I see Kimi's car as well. Then I spun after turn three, but I think there was damage on the car already, then it didn't matter to be honest. The cooler was broken, massively bent, so we had to stop anyway. It's a long race, for sure we are the wrong side of the track, so that doesn't help. We've got races to go, for sure it's bitter, but it's done."
Renault have brought both their cars in for pit stops under the safety car but it's badly timed for both. Hülkenberg is down to fifth place, Palmer in seventh.
Minor contact between Massa and Vandoorne. Williams are looking to make hay here and prove me absolutely wrong. Earlier I said they wouldn't be able to make progress, but at the moment both cars are in the top ten.
Hamilton slows the pace down hugely as he prepares for the restart. Ricciardo momentarily passes him but lets the Mercedes back in front again very quickly.
Romain Grosjean has pushed Felipe Massa out of the top ten, moving past him for the final points position. A heartstopping overtake by the other Haas puts Magnussen ahead of Ocon for 12th.
Kevin Magnussen has now closed up behind Felipe Massa, hoping to follow in his teammates footsteps. He moved to the outside and Massa squeezed him but they avoided carnage.
Distracted, Magnussen drifted back into the clutches of Massa, but then remained ahead - though Esteban Ocon took the initiative and moved ahead of the Williams as well. Lots of squeezing happening, with the walls looking closer than ever.
Massa comes into the pit lane and it's intermediates that go on the Williams. We're still looking for the first set of dry tyres here, feels like Williams could have taken the gamble there.
Tweet from @nigelmansell: Race now settled down,Lewis just doing enough to stay away from Ric.Just important to leave a small margin as track conditions are changing
Pascal Wehrlein has come into the pit lane at last, green intermediate tyres going on the Sauber, so the entire field are on the same rubber at the moment.
The track looks pretty dry now, perhaps just a bit damp in the middle sector. Someone is going to have to make the jump to slicks soon, but can understand the reticence. There's no room for errors with barriers lining almost all of the track.
Fernando Alonso, via Instagram: "Today was the day. The first podium for the team was a clear target. The car launch like a rocket and We could be running P2 in the first lap but we found ourselves in the wrong place at the wrong moment after RAI and VES had their contact. Thanks to the team for the superb effort all weekend and hope for better luck in Sepang. Thanks for the support."
Everyone is now on slick tyres, with ultrasofts the choice of the day. Only Sainz on supersofts in fifth place, and Ericsson on softs in 14th place have gone for a different strategy.
Fastest lap is changing hands constantly now. Grosjean held it momentarily, and then Massa snatched it from him. Now Hamilton is back on top out front.
Tweet from @toomuchracing: Sauber look like they totally screwed up both cars. Wehrlein on wets when it was drying, Ericsson on softs just pitted for ultras
Esteban Ocon puts his foot down and powers past Magnussen, who has lost two places in one lap. Ocon moves to 11th place, and has a two second gap to close to the other Haas.
If the race finishes like this, which is very likely, then Hamilton will have a comfortable lead over Vettel in the championship. Plenty of races still to go but it's a good buffer for the Mercedes driver.
Sainz telling his pit crew to "shut up, please" but they sounded like they were going to tell him something important about the battery. Sometimes they have useful information, Carlos.
Fernando Alonso: "Not much aware of what is happening on the inside, you are in the wrong place at the wrong time and you're just a passenger in the car. Nothing you can do. That hit was too much for the car to continue, it's an unfortunate race because I think, even in front of Hamilton in turn one, it was only Vettel, Verstappen and Kimi, so ultimately we could be in P1 now."
Kimi Räikkönen: "I don't think the conditions were anything to blame, I don't think that affected whatsoever the end result, but obviously I don't think I could have done anything to change the end result, apart from doing a bad start and not being there. That's not really my fault. Whatever cause of the accident is, it doesn't change the end result now. Everybody has different views and opinions."
Max Verstappen: "I think initially, Sebastian saw I was a little better off the line than him, so he wanted to close me so he drove to the left. Maybe he didn't see Kimi on the left, but what does he expect, I cannot just move out the way? Especially if you are fighting for a world championship, you shouldn't do that. I'm not fighting for a world championship, just a race win.
"He was just not very clever, he just kept squeezing me. Kimi also started squeezing me. What could I do? I braked but the rear tyres are wider than the front, so I just became a sandwich. It doesn't really hurt, what can you do about it? If I made a mistake myself and you go off, that's a different stroy. I was just trying to have a good start."
Hamilton in deep discussion with the pit wall over strategy. They suggest dropping back a little to keep the field compressed and stop anyone getting a free pit stop if there's another safety car. But Hamilton says he's not comfortable driving off the pace, so they agree he can dictate the pace as he sees fit.
Carlos Sainz is doing a great job in fourth place, on a different tyre to everyone else, and showing the Renault crew just what they're getting next season.
We've hit zero. Hamilton is cruising out front, Ricciardo closes the gap a little but still well over 4 seconds between the pair. Everyone just holding their breath and hoping for the end.
Incredible carnage on the first lap which robbed us of three of the main players, and it was disappointing to see Alonso go out when he actually had a car that might have worked this time out.
Midfield drivers put in stunning drives today to pick up points wherever possible, and with contracts being talked about now, that couldn't have happened at a better time.
It will be interesting to see if there's any fallout from what happened today, but we have to wait two weeks until the next race in Malaysia before any more talking can be done on track.
Tweet from 
Team radio from Romain Grosjean: "Mate, the visibility is terrible back there."
Race started.
Accident between lots of cars!
Safety car deployed.
Sebastian Vettel: "I had an average start, moved slightly to the left trying to fend off Max, the next thing I get a bump in the side, I see Kimi's car as well. Then I spun after turn three, but I think there was damage on the car already, then it didn't matter to be honest. The cooler was broken, massively bent, so we had to stop anyway. It's a long race, for sure we are the wrong side of the track, so that doesn't help. We've got races to go, for sure it's bitter, but it's done."
Another fastest lap for Hamilton, 2:01.715.
Lewis Hamilton wins the Singapore Grand Prix!
