5 Potential Breakout Stars to Watch at the 2018 Vuelta a España
The Vuelta a España, alongside the Giro d'Italia, is often used as a proving ground for talent and can be a breakthrough race for general classification hopefuls and sprinters alike: take for example Chris Froome (2011), John Degenkolb (2012), Michael Matthews (2013) and  Tom Dumoulin (2015).   With quite a handful of top bracket GC riders and practically all of the sprinters focusing instead on the Autumn classics, Tour of Britain and the World Championships in Innsbruck, Austria, many young riders are getting a chance at Grand Tour level.    Here are five riders under-26 who've impressed in the smaller races throughout the season and could take a massive step forward at this Vuelta.   Tao Geoghegan Hart (Team Sky)     Geoghegan Hart (right of centre) was an instrumental domestique  as Geraint Thomas won the 2018 Criterium du Dauphine  Photo credit: cyclingnews.com   After a tremendous showing at the Tour of California in May  (fifth)  and Criterium du Dauphiné in J...