Answer
Vincenzo Nibali and Fabio Aru were Scarponi's compatriots at Astana, where he served as a domestique. Scarponi's role was to support and assist these riders during races, providing them with water, food, and tactical advice. He played a crucial role in their successes, helping them achieve numerous victories, including Nibali's 2014 Tour de France win and Aru's 2015 Vuelta a España triumph.