Couples fell sick with a viral illness during last weekend's World Golf Championship in Akron, Ohio, and his doctor has advised him not to travel, Singapore Open organizers said in a statement Thursday.
Couples, who won the Masters in 1992, was to be one of the headliners at the tournament Sept. 7-10 at Singapore's Sentosa Golf Club, which is co-sanctioned by the Asian and European Tours.
Other top participants at the $3 million Singapore Open include defending champion Adam Scott of Australia, three-time major winner Ernie Els, U.S. Open winner Michael Campbell, England's Lee Westwood and Shingo Katayama of Japan.
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