Venus Williams says she is not playing either the women's doubles or the mixed doubles event at the U.S. Open.

Williams usually partners younger sister Serena in the women's doubles but has not played mixed doubles since early in her career. "This would have been the prefect opportunity to play mixed," she said. "I really want to, but I just need to play one event [singles] right now."

Venus has not played since Wimbledon because of a knee injury, pulling out of both her scheduled appearances in Cincinnati and Montreal.