CLOVIS - Slovakian Peter Sagan won his fourth consecutive stage of the Tour of California in Wednesday's fourth stage, leaving Australian Heinrich Haussler runner-up for the fourth day in a row. Sagan, a 22-year-old rider for the Liquigas team, stretched his overall lead to 16 seconds over Garmin rider Haussler with the victory in the 209.6km stage, winning with a time of 5hrs, 18mins, 8secs.