Hello and welcome to live coverage of stage 16 of the Giro d'Italia, a 177km mountainous slog from Pinzolo to Aprica that features the fearsome Mortirolo pass and four other categorised peaks in the Alps.

Contador has now extended his lead to 4:02 on the overall standings - but it's not Aru, but that man Landa who is his nearest opponent. Aru drops to third place a further 50 seconds back. What a brilliant stage - Contador showed just why he is the best stage racer of his generation, but we also saw Landa underline his promise with a second emphatic stage win...

Fabio Aru (Astana) crosses the line 2:49 down on his team-mate Mikel Landa, his face a picture of pain. Damiano Caruso (BMC) takes eighth ahead of a small group containing Konig (Sky), Betancur (Ag2R) and Geniez (FDJ).

Yuri Trofimov (Katusha) outsprints Andre Amador (Movistar) for fourth, about two minutes down on the winner. Ryder Hesjedal (Cannondale-Garmin) rides over for sixth.

Steven Kruijswijk (LottoNL-Jumbo) pips Alberto Contador (Tinkoff-Saxo) for second place, but the Spaniard will extend his lead in the pink jersey today. The gap was 38 seconds.

Mikel Landa (Astana) zips up his jersey and raises his arms as he crosses the line to take his second - and his team's third - win of this Giro d'Italia.

In to Aprica rides Landa - and the win is his, for sure.

Landa could well leapfrog Aru into second place tonight - and force a change of leadership at Astana.

It looks like Contador and Kruijswijk have no answer to that attack - and Landa will take the win. But the closer he gets to a win, the more damage he does to his team-mate, Aru. Remember, there are also bonus seconds available at the finish...

Landa has shed both Contador and Kruijswijk - he's got a large gap now. Second successive win for the Astana climber?

Another dig from Kruijswijk - and he forces Landa to do the chasing - and the Spaniard then puts in an attack of his own! Contador covers it, and Kruijswijk has to dig deep.

Contador sits on the back for the first time. It's stalemate out there, with everyone riding at the same pace. The Amador-Hesjedal-Trofimov chase group is 1:10 down, and Aru 1:45 down. Kruijswijk momentarily rides clear of shadow boxing Contador and Landa.

Kruijswijk and Contador are taking it in turns on the front, with Landa doing nothing. The Astana rider could exploit that by taking a second stage win - but you sense that Contador won't let this one go.

Aru has reduced the gap a little, but you get the impression that Contador will really throw down the hammer towards the end of this stage. He will be 4min+ ahead on the overall standings tonight.

Aru's face is a picture of pain and suffering as he continues his lone pursuit of the two leading groups. He's 1:50 down still, with Hesjedal, Trofimov and Amador now 1:15 behind.

Now Contador starts to drive the pace with those trademark unseated surges. Is there anyone as elegant on a bike as the Spaniard - especially in pink.

Aru is 1:55 down on the leaders but making his way back onto the wheels of Hesjedal and Amador. It's not raining but the road is wet.

Trofimov is joined by Hesjedal and Amador. On the front, it's still Kruijswijk who sets the pace.

The leading trio has just started the final Cat.3 climb to the finish in Aprica - this is the second time they have tackled this climb today and so they know exactly what to expect.

So, the gaps are as follows: Contador, Landa and Kruijswijk have 1:12 on Trofimov, 1:35 on Hesjedal and Amador and 1:47 on Aru, who is riding solo after that puncture.

Mechanical for Aru: aftyer all that, Aru needs a new bike. Exactly what he didn't want there. Sean Kelly reckons it was a rear puncture - and replays show that he's right. Now bike throw there from the Italian, who places his steed on the side of the road before picking up a fresh Specialized from the roof of his Astana team car.