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United States' player Casey O'Toole (R) competes during the 3rd round of the SMBC Singapore Open held in Singapore's Sentosa Golf Club on Jan 20, 2018. (Xinhua/Then Chih Wey)

United States' player Casey O'Toole (R) competes during the 3rd round of the SMBC Singapore Open held in Singapore's Sentosa Golf Club on Jan 20, 2018. (Xinhua/Then Chih Wey)