With the Grand Slam in sight, Serena Williams is not going to risk playing World TeamTennis.
Williams originally was slated to play for the Washington Kastles on Monday and Tuesday, but the team announced on Monday that Williams would miss those matches.
The No. 1-ranked Williams withdrew from the Swedish Open last week, citing an injured right elbow.
The 33-year-old American won at Wimbledon this month for her fourth consecutive major title, including all three in 2015. If she wins the U.S. Open, which begins Aug. 31, she will be the first tennis player to win the Grand Slam since Steffi Graf did so in 1988.
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