NEW YORK, Sept 1 (Reuters) - Karolina Muchova took advantage of an error-prone Venus Williams to advance 6-3 7-5 into the second round of the U.S. Open on Tuesday and hand the two-time champion her first opening-round loss at the tournament.
Muchova broke Williams to start the match and deployed a wide variety of shotmaking including a pinpoint serve, a slice backhand and some well-timed trips to the net to frustrate the former world number one.
Williams was sharper at the outset of the second set and served at 5-4 with the chance to extend the match to a third, but a backhand sailed on break point and Muchova leveled at 5-5.
The 24-year-old Czech held at love the next game and sealed the win when Williams issued her third double fault on match point.
The 40-year-old Williams was 21-0 in opening-round matches at the U.S. Open coming into Tuesday but the seven-times Grand Slam champion was undone by 34 unforced errors at Arthur Ashe Stadium. (Reporting by Rory Carroll in Los Angeles; Editing by Peter Rutherford )
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