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ATLANTA (AP) Mardy Fish took a hit in his gradual return to full-time tennis Wednesday night in the Atlanta Open, falling 4-6, 6-2, 7-5 to Michael Russell in a rain-delayed first-round match that began Tuesday.

It was only Fish's fourth match since the U.S. Open in September when he withdrew before a fourth-round match against Roger Federer because of an irregular heartbeat.

Ranked No. 13 in the world last July, the sixth-seeded Fish the Atlanta Open winner in 2010 and '11 - fell to 1-3 this season. He's ranked No. 63 after his first match since losing in a lower-level ATP Challenger tournament in April.

Seventh-seeded Lleyton Hewitt advanced to the quarterfinals with a deceivingly difficult 7-6 (3), 6-4 win over wild-card entry Rhyne Williams. Hewitt trailed 2-6 in the tiebreaker before winning six straight points, and only broke serve in the second set in the deciding game.