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Marana, AZ (Sports Network) - Hunter Mahan and Ian Poulter both won the quarterfinal matches by a 3 & 2 margin on Saturday to advance to the semifinals at the World Golf Championship - Accenture Match Play Championship.

Mahan, the defending champion and sixth seed in the Gary Player Bracket, ousted reigning U.S. Open winner Webb Simpson. Mahan will face Poulter in the semis.

Poulter, the third seed in the Sam Snead Bracket, took down fourth-seeded Steve Stricker, the 2001 champion. Poulter is the highest remaining seed.

The other semifinal at The Golf Club at Dove Mountain will pit Matt Kuchar against Jason Day.

Kuchar, the sixth seed in the Ben Hogan Bracket, beat fellow American Robert Garrigus, 3 & 2.

Day, the 11th seed in the Bobby Jones Bracket, held off former U.S. Open winner Graeme McDowell, 1-up.

MORE TO FOLLOW.