Movistar rider Izagirre attacked from a group of four breakaway riders in the climb leading to the finish and never looked back.
Silvan Dillier won from an early breakaway to take the sixth stage of the Giro d'Italia on Thursday while Bob Jungels retained the overall lead.
Juncker, 62, a conservative former prime minister of Luxembourg, took office on November 1 2014 after a long spell at the helm of the Eurogroup, gathering ministers of countries which share the euro.
Years worth of confidential German diplomatic cables provide a candid account of Luxembourg’s obstructive manoeuvres inside one of Brussels’ most secretive committees.
The European Union is starting legal action against Britain, Germany, Spain and Luxembourg for not imposing penalties against Volkswagen for using illegal software to hide vehicle emissions.