FUCECCHIO, Italy — Primoz Roglic may have made a strong impression in the opening time trial of the Giro d'Italia but the overall race favorites will need to peak during the final week when the peloton tackles the biggest climbs, Vincenzo Nibali's coach said on Sunday.

Slovenian Roglic retained the overall leader's pink jersey after the second stage, a 205-km ride from Bologna, keeping a 19-second lead over Briton Simon Yates and 23 seconds over two-time winner Nibali of Italy.

Although Nibali would have welcomed wearing the 'Maglia Rosa', the pressure of controlling the race now lies on the shoulders of Roglic's Jumbo-Visma team, which could have consequences later in the race.

"They will have a lot of work because the next stages are over 200km and the weather is also not the best weather," Paolo Slongo told Reuters.

"Their team will suffer from these long, hard stages."

Asked about Nibali's form, Slongo said that the 34-year-old would not hit his peak just yet.

"We prepared him to be at his best for this Giro d'Italia, who is the main goal of his season," the Italian said.

"We shaped him step by step so that he can perform for the Giro, but he will be at 100% in the last week when the hardest climbs come.

"If, in that final week, you feel the fatigue of the first weeks, then the race is hard to manage."

In 2016, Nibali demonstrated that he could time his efforts perfectly over three weeks, leapfrogging Esteban Chaves into top spot on the penultimate day with a perfectly-executed attack during the last mountain stage.

This year's toughest stages are the 16th and 20th, featuring grueling climbs on which the race is likely to be won and lost. — Reuters