This year's Vuelta a Espana is set to be decided in the mountains with nine summit finishes included in the route unveiled on Saturday.

The race will start with an 8km individual time-trial in the southern port city of Malaga on August 25 and will spend eight days in the south of Spain before journeying through the mountainous terrain close to the Atlantic coast and heading into the Pyrenees for a decisive final stretch.

It will conclude in the capital Madrid on Sunday, September 16.

"We want the mountains to be key in deciding the Vuelta," said Vuelta director Javier Guillen.

Last year's race was won by Chris Froome, as he became just the third rider in history to win the Vuelta a Espana and Tour de France in the same year.

But it was revealed last month that Froome -- the first British winner of the race -- had given an adverse doping test during the Vuelta.

He was found to have twice the permissible amount of asthma medication Salbutamol in his system and could yet be stripped of his title.

If the 32-year-old does take part, he will see summit finishes at Les Praeres in Asturias and at Balcon de Bizkaia in the Basque Country for the first time in the history of the race.

The Vuelta will also return to Lagos de Covadonga in the Picos de Europa, where Colombian Nairo Quintana took the leader's red jersey in 2016 before holding it all the way to the end.

After the first stage, the only other time-trial will be on the 16th stage, 32.7km from Santillana del Mar to Torrelavega.

That could be seen as a measure taken to prevent a rider like Froome wrapping up overall victory early on, although Froome won the only individual time-trial last year having done likewise in 2016.

The overall winner may not be decided until the penultimate stage in Andorra, before riders head to Madrid for the traditional finish.