Fourth-seeded Vasek Popisil, Jack Sock advance to Atlanta Open quarterfinals

ATLANTA – Fourth-seeded Vasek Popisil of Vancouver advanced to the Atlanta Open quarter-finals, beating Ukrainian qualifier Illya Marchenko 7-5, 6-3 on Wednesday.

American Jack Sock topped New Zealand’s Michael Venus 6-4, 6-2 in another second-round match, and seventh-seeded Yen-hsun Lu of Taiwan beat American Alex Kuznetsov 6-4, 6-4 in a first-round match.

Defending champion John Isner, the No. 1 seed, will open play Thursday against wild-card entry Robby Ginepri of Atlanta. Ginepri beat Ukraine’s Sergiy Stakhovsky on Tuesday.

South Africa’s Kevin Anderson, the No. 2 seed who lost to Isner in the final last year, will start play Thursday against qualifier Thiemo de Bakker of the Netherlands.

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