Neither won a tournament during the hard-court tune-ups, but never discount the sisters at majors. Defending champion Serena is looking for her third Grand Slam of the year and fourth U.S. Open crown; she is 18-1 in majors and 20-9 in other tournaments this year. Venus, who won the Open in 2000 and '01, is coming off a loss to Kateryna Bondarenko in her first match at the Rogers Cup in Toronto.
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