Peter Hanson and Phil Mickelson, who started the day in first and second place, respectively, faltered early.
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Defending champion Peter Hanson of Sweden is one shot further back while Denmark's Thomas Bjorn carded a 70.
England's Ian Poulter then salvaged a half against Sweden's Peter Hanson after trailing by one with two holes left.
Peter Hanson of Sweden and Pedro Linhart of Spain were also four under.
Spain's Gonzalo Fernandez-Castano, Sweden's Peter Hanson and Jose-Filipe Lima of Portugal were alongside the English trio one shot off Cevaer's lead.
McIlroy's closest European rival, Ryder Cup teammate Peter Hanson, chose not to play in Singapore and will not line up again until Dubai.
Quiros fired 64 to lead by four shots from Peter Hanson, who held the first-round lead but dropped back with a 72 on Friday.
He has a three shot advantage over Scott Jamieson, Gonzalo Fernandez-Castano and Peter Hanson, who is one of three European Ryder Cup players in the field.
Harrington teamed up with world number number eight Luke Donald, Ian Poulter went out with Ross Fisher while Peter Hanson and Miguel Angel Jimenez completed the match-ups.
Justin Rose, third in the Race To Dubai standings, was tied for seventh on 11 under after a 69 -- one shot ahead of second-placed Swede Peter Hanson (70).
The European team also included Lee Westwood, Rory McIlroy, Martin Kaymer, Ian Poulter, Ross Fisher, Francesco Molinari, Edoardo Molinari, Peter Hanson, Luke Donald, Padraig Harrington and Miguel Angel Jimenez.
Further birdies at the 13th and 17th saw him card a 67 to lead South Africa's 2010 British Open champion Louis Oosthuizen and Sweden's Peter Hanson by a shot.
But Ryder Cup brothers Francesco and Edoardo Molinari were among those who failed to make it through to the final day at St Andrews, along with Swede Peter Hanson.
Englishman Boyd dropped to a tie for ninth on 204 after carding 71, while the highest-ranked player of those who made the halfway cut, Sweden's world No. 24 Peter Hanson, was tied for 37th.
Europe team-mate and another Ryder Cup rookie Peter Hanson has been given at least Friday morning to recover from a chest infection that forced him to pull out of last week's Vivendi Cup with a chest infection.
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Colsaerts and Poulter join world No. 1 Rory McIlroy, Justin Rose, Johnnie Walker winner Paul Lawrie, McDowell, Francesco Molinari, Luke Donald, Lee Westwood, Sergio Garcia, Peter Hanson and Kaymer in the team for the September 28-30 event.
Swede Peter Hanson finished third on nine-under while defending champion Ian Poulter charged through the field on the final day to card a 66 and finish in a tie for fourth at eight-under alongside Scot Richie Ramsay and Thailand's Pariya Junhasavasdikul.
For Europe, Graeme McDowell and Rory McIlroy played with Luke Donald and Martin Kaymer, Harrington and Peter Hanson went out with Lee Westwood and Ross Fisher with Edoardo Molinari and his brother Francesco taking on Ian Poulter and Miguel Angel Jimenez.
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