Defending champ out at U.S. Amateur

Defending champ out at U.S. Amateur

Published Aug. 28, 2010 1:00 a.m. ET

Stanford's David Chung has ousted defending U.S. Amateur champion Byeong-Hun An in the semifinals of the 110th championship.

Chung rallied from 3 down after nine holes to beat An 1 up with a par on the 485-yard 18th hole Saturday. Chung won five holes on the back nine and benefited from an unlucky break for An on the 18th, when his second shot tucked behind a grass mound in a greenside bunker.

An was trying to become the first back-to-back champ since Tiger Woods won three straight from 1994-96.

In the other semifinal, Oklahoma State's Peter Uihlein won three holes in a five-hole stretch on the back nine to beat 18-year-old Patrick Cantlay 4 and 3.

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Chung and Uihlein will play a 36-hole final on Sunday.

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