Nibali explained why he didn't launch a shark attack on today's Stage 19 with the ramp up to the finish in San Martino di Castrozza.
"It was definitely a fast climb and therefore it was difficult to make the difference between the top riders.
"In the last two kilometres the speed was high and apart from the attack of Miguel Angel Lopez the overall leaders controlled each other."
The Italian didn't rule himself or anyone out from a brave attempt on the 194km Stage 20, which finishes on the Cateegory 1 Monte Avena.
"My feelings are good and tomorrow who wants to win the Giro will have to invent something."
Mikel Landa sits in fourth overall, 3:03 separating he and Movistar team mate Richard Carapaz. The Ecuadorian perhaps diplomatically in a team release stated he was confident he had the full support of the team, including Landa.
“We tried to go as calm as possible today: since the beginning, we had Lluís, Jasha and Rojas always leading the group, and at the final climb, Mikel did a crucial job for me.
"More than a team-mate, I have a strong leader by my side with him, a rider whom I learnt a lot from. He’s got way more experience than me, he acts as a sports director on the road with our team-mates, and that helps us a lot.
“It’s huge tomorrow: a stage with lots of big mountains, really tough. I trust my team-mates and they also have loads of confidence on our chances."
Roglic tried to launch a couple of attacks on the final climb on Stage 19 and remains stoic.
"Today was a good day”, Roglic said. “On the final climb I tried to get away twice, but the climb wasn’t difficult enough for that. Tomorrow will be a crucial day with a lot of climbing. I am expecting big time gaps.”
Could it all go according to plan for Carapaz or will somebody set fire to the script?