Hello and welcome to live coverage of the big one: it's double Stelvio day on the Giro d'Italia with the 222km queen stage 16 from Rovetta to Bormio - one that also includes the fearsome Mortirolo. Sit tight, buckle up, and join us for the ride...

The pace was very high over the first hour of racing with 50km covered ahead of the climb. That tempo will surely take its toll once the riders start going uphill...

We join the stage LIVE with a group of 27 over one minute clear following the opening 70-odd kilometres. They're approaching the first climb of the day, the Passo del Mortirolo.

The riders rolled out of Rovetta around 10:40 CET with the field down to 174 following the third rest day. The sun is out and the temperature is 21 degrees.

And here were the classification leaders at the start of today's stage in Rovetta. So it's Tom Dumoulin in the maglia rosa, Fernando Gaviria in the maglia ciclamino, Omar Fraile in the maglia azzurra (even though he trails Dumoulin by 51 points to 49 in that particular battle), and Bob Jungels in the maglia bianca.

A reminder of that the riders must tackle today: it's the 'easy' side of the Mortirolo followed by a double ascent of the snow-capped Stelvio, including the never-done-before Umbrail pass ahead of a fast descent to the finish in Bormio. There's 5,400 metres of climbing in total - hence the five-star status...

So, Dutchman Tom Dumoulin is sitting pretty on the top of the standings - and still has that 27.6km final day time trial into Milan to look forward to. But before then he must weather the high-mountain storm, starting with today's stage in the Alps, which is followed by Thursday's stage in the Dolomites and then another summit finish on Friday, and Monte Grappa on the penultimate day of the race. In short: it's about to get a whole lot tougher for the maglia rosa. Does he have what it takes? Read my rest day analysis...

Dumoulin (Team Sumweb) crossed the line on the same time in eighth to remain top of the general classification, but his lead over second-placed Quintana was cut to 2min 41sec after the Colombian received six bonus seconds. Pinot is 3min 21sec down in third place, while defending champion Vincenzo Nibali (Bahrain Merida) stays 3min 40sec adrift in fourth after finishing seventh on the day.

Before Monday's rest day, Bob Jungels out-sprinted his fellow general classification contenders to win stage 15 of the Giro d’Italia, as Tom Dumoulin retained the overall lead. A select group of race favourites pulled away from the peloton on a small late climb and arrived together to the finish in Bergamo, where Jungels (Quick-Step Floors) comfortably beat Nairo Quintana (Movistar) into second place and Thibaut Pinot (FDJ.fr) into third.