Fiji's Vijay Singh moved into a one-shot lead in the Singapore Masters after three rounds at the Singapore Island Country Club.

Padraig Harrington was unable to capitalize on his good start to the third round of the Singapore Masters.

Masters champion Vijay Singh remained on course for back-to-back victories on the European Tour in the Caltex Singapore Masters.

Harrington’s travails continued when he bogeyed the 11th hole to fall back to eight under and nine shots off the pace.

Colin Montgomerie fired a second round 67 in the Caltex Singapore Masters - but still found himself eight shots off the lead.