Titleholder Jazz Janewattananond of Thailand made a fast start to the defence of his SMBC Singapore Open crown with a four-under-par 67 to sit two strokes adrift of surprise clubhouse leader Kosuke Hamamoto on Thursday. Thai-Japanese Hamamoto, playing the SMBC Singapore Open for the first time, charged to a blemish-free six under 65 to lead by one from world number …
