The 166-kilometre stage between Bilbao and Los Machucos finished with a short (6.8km) but hellishly steep climb, where the Slovenian pair soon broke away to make Slovenia's biggest success ever.

In the all-Slovenian finish, Pogačar, the 20-year-old UAE Emirates rider, won his second stage victory to advance to the 2nd spot overall, putting on the best young rider's white jersey.

Wearing the race leader's red jersey, Roglič (Jumbo-Visma) only increased his overall lead ahead of Spain's Alejandro Valverde (Movistar) to two minutes and 25 seconds.

Pogačar, in his debut appearance at the Vuelta, lags three minutes and a second behind.

Coming in third in the 13th stage, France's Pierre Latour (AG2R La Mondiale) finished as many as 27 seconds behind the Slovenian riders today.

"I'm happy about today's achievement but the Vuelta is not over yet," Roglič commented after the race.

Pogačar was in disbelief: "I was told by the radio link that no one was behind us, I felt I'was looking at a good chance. I'm overwhelmed."