Johnnie Walker Classic: South Korean KJ Choi leads the Johnnie Walker Classic in Perth on 13-under after rounds of 65 and 66.

Choi finished the day two ahead of American Kevin Stadler, son of former Masters champion Craig.

Adam Scott, joint first round leader with Stadler, slipped back to joint third with fellow Australian Richard Green on nine under, while English rookie Ross Fisher and Ryder Cup star Ian Poulter are a stroke further back.

Poulter is also looking to move into the world’s top 64 for the matchplay, the event in which he reached the semi-finals last year.

All three Irishmen in the field missed the cut which fell at two-under with Damien McGrane narrowly missing out by a shot. The meath professional carded a second round 69. Peter Lawrie's level par 72 left him on one over, one ahead of Gary Murphy (73).

Colin Montgomerie, meanwhile,  has missed a second-successive cut thanks to a second round 74 left the Scot on level par. Needing an eagle on the par-five last at The Vines to be sure of making it through to the weekend, the eight-time European number one charged his 40-foot attempt six feet past the hole and then missed the return.

Last week Montgomerie made an early exit from the Dubai Desert Classic in the week that a divorce settlement reported to be £15 million was agreed with his ex-wife Eimear.

The last time the 42-year-old missed two cuts in a row was two years ago either side of his heroics at the Ryder Cup in Detroit. The first of those came at the German Masters in the week his wife was granted a divorce.

Two under par overnight in Australia, Montgomerie improved to four-under, but then had double bogeys on the 11th and 14th. He did birdie the 16th and 17th, but even though a third in succession might have squeezed him into the final round he went for the eagle and was never on line with the one back.

He was not the only big-name casualty. South African Retief Goosen missed his first European Tour cut since 2003, also finishing on level par, while New Zealander Michael Campbell bowed out at halfway for the first time since winning the US Open last June.

Ryder Cup captain Ian Woosnam missed a third successive cut this season and Nick Dougherty’s failure to make it through almost certainly ends his chances of moving into the world’s top 64 for the Accenture World Match Play in California in two weeks’ time.