Shinichiro Tanaka, Associated Press
Italy's Cristian Deville clears a gate during the first run of an alpine ski, men's World Cup slalom, in Adelboden, Switzerland Sunday Jan. 8, 2012. Deville clocked the fastest time.

ADELBODEN, Switzerland — Marcel Hirscher of Austria extended his perfect start to 2012 by winning a World Cup slalom Sunday to pad his lead in the overall standings.

Hirscher mastered rapidly worsening conditions on the Kuonisbaergli slope to edge defending overall champion Ivica Kostelic by 0.27 seconds.

Stefano Gross of Italy trailed Hirscher by 0.99 in third. Another Italian, Cristian Deville, had shared the lead with Hirscher after the first run but faded to ninth.

Hirscher won for the third time in four days after taking Thursday's night slalom in Zagreb, Croatia, and the classic Adelboden giant slalom Saturday.

Kostelic moved up to second in the overall standings but trails Hirscher by 230 points.