Cavite, Philippines, April 23: Newcomer Oscar Zetterwall became the first Swede to win on the Asian Development Tour (ADT) when he closed with a second consecutive four-under-par 68 to seal a three-shot victory at the US$60,000 ICTSI Sherwood Hills Classic on Saturday. Oscar Zetterwall of Sweden The 27-year-old Zetterwall, playing in his first season on…