Ireland's Eddie Dunbar won the 19th stage of the Vuelta a Espana as Spain's Enric Mas maintained his overall lead with two stages remaining.

Friday's stage was a hilly slog of 210.8km from Velez-Malaga to Penas Blancas, with Dunbar, 30, catching and passing Santiago Buitrago 300 metres from the finish.

Both were part of a four-man breakaway and the Colombian, the King of the Mountains leader, attacked with two kilometres to go.

Dunbar did not respond initially but the Pinarello-Q36.5 rider timed his counter-attack perfectly to cross the line 14 seconds before Buitrago, with his British team-mate Thomas Gloag in third.

Four-time Vuelta winner Primoz Roglic closed the gap on race leader Mas by 33 seconds during Thursday's time trial, but the Movistar rider held on to his lead despite general classification rivals Roglic and Richard Carapaz trying to increase the pace on the 18km climb to the finish.

Britain's Oscar Onley finished alongside the rest of the leading contenders to retain his fifth position overall and keep hold of the white jersey for the best young rider.

Mas, who has finished second overall three times in the Vuelta, has a cushion of one minute and 37 seconds heading into Saturday's 186.8km mountain stage from La Calahorra to Collado del Alguacil.

The 31-year-old will hope to seal his first Grand Tour title when the race concludes on Sunday with a 112km stage in Granada.

Vuelta stage 19 results

Eddie Dunbar (Ire/Pinarello-Q36.5) 5hrs 54secs

Santiago Buitrago (Col/Bahrain Victorious) +14secs

Thomas Gloag (GB/Pinarello-Q36.5) +23secs

Urko Berrade (Spa/Kern Pharma) +44secs

Marcel Camprubi (Spa/Pinarello-Q36.5) +1min 44secs

Andreas Leknessund (Nor/Uno-X Mobility) +2mins 1sec

Guillaume Martin Guyonnet (Fra/Groupama-FDJ United) +2mins 11secs

Chris Hamilton (Aus/Picnic–PostNL) +2mins 39secs

Kevin Vermaerke (US/UAE Emirates XRG) +3mins 3secs

Sergio Samitier (Spa/Cofidis) +3mins 17secs

General classification after stage 19

Enric Mas (Spa/Movistar) 65hrs 52mins 3secs

Primoz Roglic (Slo/Red Bull-Bora-Hansgrohe) +1mins 37secs

Felix Gall (Aut/Decathlon CMA CGM) +3mins 1sec

Richard Carapaz (Ecu/EF Education-EasyPost) +5mins 17secs

Oscar Onley (GB/Netcompany Ineos) +6mins 3secs

Jakob Omrzel (Slo/Bahrain Victorious) +7mins 6secs

Clement Berthet (Fra/Groupama-FDJ United) +7mins 57secs

Cristian Rodriguez (Spa/XDS Astana) +8mins 21secs

Mattias Skjelmose (Den/Lidl-Trek) +9mins 6secs

Harold Tejada (Col/XDS Astana) +10mins 27secs