Victory by half a wheel for Ackermann there. It was Gaviria who opened it up but Ackermann was too strong. Demare took third place ahead of Caleb Ewan.
Frascati - Terracina
Giro d'Italia - 15 May 2019
Giro d'Italia – Follow this cycling race live with Eurosport. The action starts at 14:00 on 15 May 2019. Our live coverage lets you follow all the key moments as they happen.
Get all the latest on Cycling: the big races, schedules and results.
Victory for Pascal Ackermann! The German powers through and goes neck-and-neck with Caleb Ewan, but it's the maglia ciclamino who comes off best.
Viviani is out of this with a mechanical issue - that or he doesn't have the legs.
Under the flamme rouge and this is going to be chaotic. QuickStep have come to the front with two men pulling Viviani.
CCC Team back on the front with Bora and Lotto Soudal just behind. It's a small main group now after half the peloton have dropped back following the neutralisation.
Now Demare, Ackermann, Viviani, Gaviria and Ewan - the Big Five - are preparing themselves for the finale.
CCC Team have men around Jakub Mareczko, too. Could the little guy finally get that elusive WorldTour win?
This is also a chance for some of the smaller teams with less illustrious sprinters to grab the bull by the horns – and with 5km remaining, the Israel Cycling Academy squad of Davide Cimolai have sniffed out an opportunity.
Caleb Ewan’s Lotto Soudal and Fernando Gaviria’s UAE Team Emirates have taken up up pacing duties with Pascal Ackermann’s Bora, Arnaud Demare’s Groupama-FDJ and Elia Viviani’s Deceuninck-QuickStep all involved.
You can see why they have neutralised the final circuit: there's so much standing water on the home straight, it would be carnage if the whole peloton are rampaging through with a racing mindset. And there we are - Jumbo-Visma lead the pack over to assure Roglic's pink jersey and the times are taken as the bell sounds for the final lap.
The peloton is approaching the finish straight for the first time - the times for GC will be taken with this passage of the line because of the foul weather. Afterwards it will be game-on for those who want to contest the sprint.
It's been an utterly miserable day today - the only ray of light being the fact that this rain coincided with today's 140km stage rather than yesterday's 235km behemoth.
Elia Viviani and Fernando Gaviria are currently riding alongside each other and having a chat. They’re good friends and former teammates – but rivals for today’s finish. When the Italian national champion was relegated from stage 3 a couple of days ago, his win was gifted to the Colombian – much to Gaviria’s dismay, who always maintained that Viviani deserved the win.
I'll be putting in my Breakaway debut appearance after today's stage, where we'll discuss all the action...
It's all over for Vervaeke who is swept up by the pack after his brief cameo on the front of the race.
Just 16 seconds now for Vervaeke who's on a wide and straight dual carriageway. If he looks over his shoulders he'll see, in the distance, compatriot Pieter Serry of Deceuninck-QuickStep leading the chase on the front of the peloton.
The Groupama-FDJ team of Arnaud Demare have come to the front as well to help lead the chase on Vervaeke, who surely won't win today, but has given his Sunweb team-mates something to talk about over the dinner table other than Dumoulin's withdrawal.
Just the one minute now for Vervaeke.
Puncture for Caleb Ewan (Lotto Soudal) and that will make things tough for the Australian, who finished runner-up yesterday after almost catching Richard Carapaz on the line. As a response, Bora, UAE and QuickStep seem to have upped the tempo on the front - which just isn't cricket, but goes to show how much of a threat Ewan is to the likes of Ackermann, Gaviria and Viviani...
Still 1'25" for lone leader Vervaeke, who rides through a puddle on a tight corner and hits a hidden pot-hole, but lives to fight another, hmm, let's see, 20 minutes out ahead of the pack.
It's all over for the four remaining riders in the break so there's only one man up the road now - Louis Vervaeke of Team Sunweb, who is onto the descent towards the flat run towards Terracina and that city circuit finish. The Belgian has one minute to play with.
After a short downhill the road is heading back upwards. Vervaeke, our lone leader, has 45 seconds over the four other escapees now, with the pack a further 45 seconds back.
Vervaeke takes the maximum 3pts over the summit. The chasers come over 17 seconds down with Santaromita taking 2pts ahead of Barbin, who pockets the final point. The gap back to the pack is 1’43”.
Louis Vervaeke zips clear of his fellow escapees in a bid to pocket those KOM points – also in a bid to restore some pride and boost morale at Sunweb following the withdrawal of their leader Tom Dumoulin earlier today.
We're onto the Cat.4 climb to Sezze. And still it rains... It's only a few kilometres long, this climb, and it's the kind of test that most pros will do in the big ring.
The gap has come down to 50 seconds but it's now back up to 1'15" for the five leaders.
Today's finish includes a city centre circuit around Terracina which the riders tackle twice. It's just been announced that the GC times will be taken at the first crossing of the line because of the foul weather. That makes sense given the rain and the technicality of the finish.
Barbin doubles up with maximum points at the second intermediate sprint at Latina.
Leg warmers or tights are being favoured by most riders out there today; some even have snoods around their necks as well as the rain capes. It's not particularly cold - around 12 degrees Celsius - but extremely grim and relentlessly wet.
Roglic now has a few Jumbo-Visma team-mates with him - plus a pair of new dry gloves - as he regains contact with the peloton. The five leaders still have 1'30" over the pack but there's no huge desire to be racing today.
Roglic is currently off the back of the peloton after either a mechanical or a call of nature. He looks pretty relaxed and it would be an anomaly for someone to attack him now - especially in these conditions. Could the Slovenian become the first rider since Gianni Bugno in 1991 to lead the Giro from start to finish? On the evidence so far, you wouldn't bet against it.
The five leaders mop up the lion's share of the points at the intermediate sprint before Pascal Ackermann consolidates his lead in the maglia ciclamino competition by sprinting for sixth when the peloton comes through.
Orsini is back with the leaders but Ciccone is no longer there. With only 3pts up for grabs on that Cat.4 climb perhaps the Trek rider decided that it wasn't worth the candle.
One of the two Bardiani riders in the break - Orsini - was distanced on the descent and trails the leaders by 15 seconds as we enter the final 100 clicks of today's short stage.
MOTO CRASH: One of the race motorcycles has gone down on a corner. The rider looks okay and is on his feet as the peloton passes.
And just after I typed that, the cameras skipped to Sweden's Awet Andremeskel clambering out of a ditch after leaving the road. The Eritrean-born rider from Israel Cycling Academy must have lost it on that bend - but he's good to go after a quick bike change.
We're onto that descent now and there's a lot of static water and hazards here for the riders to negotiate. A crash here would be needless and potentially very hazardous so let's hope they all keep it together.
Of course, one man's ears will have pricked on the news of Dumoulin's withdrawal this afternoon... Roll on the Tour de France!
That brief lull in the weather didn't last long. It's raining gatti e cane out there. The riders are on a small rolling plateau ahead of the long descent towards the two intermediate sprints that precede the only categorised climb of the day. The gap is 1'55".
Two minutes is still the gap for the six leaders as they crest the top of this second uncategorised climb at Rocca di Papa. The weather looks to be a bit better on this side of the hill, I'm pleased to say.
Elia Viviani is the overwhelming favourite for today's stage among the Eurosport experts following his disqualification a couple of days ago. Who are you backing? Tweet me @Saddleblaze and I'll publish the best suggestions.-
More on that overnight doping revelation involving Nibali's team-mate Koren - dating back to 2012/13.
The best placed rider in this break is the Belgian Louis Vervaeke of Sunweb. He's 6'07" down on Roglic so the Slovenian won't be too worried right now.
The gap is pushing two minutes now for the leaders as they approach the foot of this next uncategorised climb.
The picture of the day...
The leaders go over the summit of the first climb with a gap of 1'15". There's a cobbled section through the centre of town in Rocca Priora. It's also misty and generally pretty grim all round. What happened to the summer in Italy? There isn't a cloud in the sky here in London...
Here's today's official profile, which will give you a better idea of this tricky start to a stage that is otherwise very flat save for that one Cat.4 climb.
The six leaders are: Giulio Ciccone (Trek-Segafredo), Louis Vervaeke (Team Sunweb), Umberto Orsini (Bardiani-CSF), Enrico Barbin (Bardiani-CSF), Ivan Santaromita (Nippo Vini Fantini-Faizane), Miguel Florez (Androni Giocattoli-Sidermec). The gap is 55 seconds as a cluster of Jumbo-Visma riders gather on the front to lead the chase and keep their man Roglic out of trouble.
We have a six-man break off the front with a gap of around a minute. It includes Giulio Ciccone, the maglia azzurra from Trek-Segafredo, and a Sunweb rider looking to improve morale following that withdrawal by their leader, the 2017 champion.
Sad news there but the Dutchman clearly wasn't feeling good in the neutral zone and has decided to call it a day before he does himself any more serious damage. The Sunweb rider will now concentrate on getting back to fitness ahead of July's Tour de France.
Tom Dumoulin has abandoned the Giro d'Italia.
They're off! And, in miserable weather, we have attacks from the outset. That's because we have two unclassified climbs in the first 25km which could be decisive in the outcome of the stage: should a good break form, it could perhaps go the distance.
The other news over night is that Nibali's Bahrain Merida team-mate Kristijan Koren has been suspended by his team and booted off the race because of his involvement in Operation Aderlass. More on that below...-
The riders are currently rolling through the neutral zone ahead of the official start. Here's our race leader Primoz Roglic, who managed to avoid the incidents yesterday to take time over all his GC rivals. The Slovenian now has a 35-second lead on Simon Yates and a further four seconds on Vincenzo Nibali.
It's a foul day in the suburbs of Rome: after yesterday's sunshine, the rain is back on the race and umbrellas (for the spectators) and jackets (for the riders) are the order of the day. Not the kind of weather you'd want to test a sore knee on after a terrible crash 18 hours earlier...
The big news today is that Tom Dumoulin will race on despite cutting his knee badly and conceding four minutes yesterday.
Yesterday, a massive crash with six kilometres remaining tore through the peloton and ended Dutchman Tom Dumoulin’s chances of Giro glory as Slovenia’s Primoz Roglic extended his lead in stage 4, won by the Ecuadorian Richard Carapaz.
Ciao regazzi! Welcome to live coverage of stage 5 of the Giro d'Italia - a short and sharp 140km ride from Frascati to Terracina which kicks off with two climbs but finishes on the flat after the only categorised climb of the day. It should open the door again to the sprinters although after yesterday's drama you can't discount a break going the distance...