Poulter made eight birdies in a blemish-free round at Singapore's Sentosa Club
Second round leaderboard: -12 A Scott (Aus) -10 I Poulter (Eng) -9 G McDowell (NI), F Hed Andersson (Swe), K Kang (Sko), J Luiten (Ned) (after 12 holes) Selected others: -7 J Donaldson (Wal) -6 M Kaymer (Ger), C Wood (Eng), P Mickelson (US), MA Jimenez (Spa) -4 C Montgomerie (Sco), F Molinari (Ita) -2 P Harrington (Ire)
Defending champion Ian Poulter shot a brilliant eight-under-par 63 to put himself two shots off the lead after the second round of the Singapore Open.
Australia's Adam Scott heads the field on 12 under after a 65, while Poulter's Ryder Cup team-mate Graeme McDowell is on nine under following a round of 68.
Joint overnight leader Chris Wood dropped to tied 15th after a 73.
Masters winner Phil Mickelson is also on six under along with Germany's Martin Kaymer who shot a second 68.
Many of the golfers still had to finish their first rounds at the Sentosa Golf Club after rain had delayed the opening day's play by four hours, while some second rounds remain incomplete because of bad light.
The first two rounds were split between the Tanjong and Serapong courses.
England's Poulter played 30 holes on Friday, but showed no signs of fatigue, holing eight birdies including a monster putt at the last.
"It was at least 30-odd places from right at the back of the green to the hole so it was getting close on to 100 feet," said the 34-year-old, who won last year's event by a shot.
The last two rounds will be played solely on the tougher Serapong course and Poulter is relishing the challenge.
"I hear it might be a bit windy on Sunday which is good too and so I have put myself up there in the hunt again which is all I could do," he added.
"It is definitely the harder of the two courses but I like that."
Two-time winner Scott was happy with his efforts although slightly disappointed with making two bogeys having gone out in 29.
"It was a shame to slow down a bit on the back nine but that's golf I suppose," said the 30-year-old Australian.
Meanwhile, Northern Ireland's McDowell, 31, recorded birdies on the first four holes before a bogey on the fifth checked his progress.
McDowell is joined by Fredrik Andersson Hed and Kang Kyun-nam on nine under.
Rikard Karlberg, Prayad Marksaeng, Jeev Milkha Singh and Liang Wen-chong were tied for seventh on eight under par, while Welshman Jamie Donaldson was joined by Kim Bi-o, John Huh and Gregory Bourdy on seven under.