Ryder Cup pair Lee Westwood and Paul Casey have confirmed they will tee up at the 2009 Johnnie Walker Classic in Perth in February.
Westwood, ranked 12 in the world, and his fellow Englishman will line-up alongside home favourite Greg Norman at the event.
However, Westwood's entry means he could now pull out of the following week's Accenture World Match Play Championship in Arizona.
Two weeks ago the world number 12 said: "You could go to Tucson, get there on the Monday, practise on Tuesday and then fly home on Wednesday night having shot a 65 and a guy shooting 64 beats you.
"It doesn't really fit in with all the stuff I want to do around it. It messes up your schedule for the next couple of weeks as well with it being an eight-hour or seven-hour time change.
"At some point you just have to evaluate it."
In the last five stagings of the World Match Play he has gone out in the first round three times and in the second round twice.
Meanwhile, Westwood is looking forward to taking on Norman Down Under.
The last time Westwood met Norman on Australian soil was at the Australian Open in 1997 when the Englishman upstaged the then world number one at the fourth hole of a sudden-death play-off in Melbourne to win the title.
"I'm already looking forward to playing in Perth and to the Australian sunshine which will be a welcome change from the European winter," Westwood said.
"It will also be a tremendous challenge to come up against Greg again on his home soil especially after the form he showed at this year's Open Championship."
The tournament will be held from February 19-22.
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