Vinokourov won six races in 1998, his first year as a professional, including the Four Days of Dunkirk, the Tour de l'Oise, and stages in both the Tour of Poland and Circuit des Mines. In early 1999, he won the Volta a la Comunitat Valenciana stage race, and three months later took two stages of the Midi Libre. Vinokourov also won the Critérium du Dauphiné Libéré, beating the American Jonathan Vaughters along the way. (He lost the yellow jersey to Vaughters after the Mont Ventoux time trial but regained it on the following mountain stage.)