Adrien Costa, one of the most talented young American riders of this generation, will not return to pro racing in 2018.
In 2016 these six riders rose to the top of the domestic peloton. But are they ready for the jump to the WorldTour?
The 19-year-old has ridden to impressive results this season, including a runner-up at the Tour of Utah.
American Adrien Costa, 19, has ridden himself onto the podium at Tour de l'Avenir with one stage remaining.
Adrien Costa, an 18-year-old American, emerges as a top cyclist and has a chance to prove himself with Belgian Etixx – Quick-Step team.