(Reuters) - Colombian Nairo Quintana laid down an early marker for the Tour de France when he won the Tirreno-Adriatico stage race in impressive fashion on Tuesday. The Movistar rider prevailed in Sunday's epic mountain stage which ended at top of the Terminillo in a snow storm, ahead of Alberto Contador, Thibaut Pinot and Vincenzo Nibali. Nibali, the defending Tour de France champion, had a difficult week, being distanced by the major riders in Sunday's stage as the Italian struggles to find his form. ... More...