Minoza is at 17-under 125, which is a European Tour record after 36 holes. Vijay Singh is two shots back in second place.
The Bukit Course at the Singapore Island Country Club has been kind to Minoza in the past, as he has won here twice before. The 41-year-old won as an amateur in the 1970s, and in 1998 at the Rolex Masters. He was runner-up twice at the Singapore Open.
'This course is one of my favorites,' Minoza stated. 'But I can't believe I shot 61. The first nine I was hitting my driver no so good but the irons were very good and my putter worked today.'
Three birdies on the front nine helped Minoza to a good start, and then he made five in a row on the back nine.
First-round co-leader Padraig Harrington is tied for third with Prayad Marksaeng at 12-under-par. Oliver Edmond and Maarten Lafeber are each at 11-under.
Colin Montgomerie is a little further back at 9-under.
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