 The early leaders of the race were Esteban Chaves ( Orica – GreenEDGE ) and Tom Dumoulin ( Giant – Alpecin ) , who exchanged the leader 's red jersey several times during the first ten days of racing , with both riders winning summit finishes in the first week . Aru took over the race lead following the mountainous Stage 11 , which took place entirely within Andorra . He kept his lead for five stages as the race entered the mountains of northern Spain , but lost it to Rodríguez on Stage 16 . Dumoulin took the lead back on Stage 17 – the race 's only individual time trial – with Aru three seconds behind in second place . Aru attacked throughout the final stages and , on the penultimate day , finally dropped Dumoulin , who fell to sixth place overall . Aru therefore took the first Grand Tour victory of his career . 
