Serena Williams pulls out of World TeamTennis
With the possibility of playing the Grand Slam in sight, Serena Williams is not going to risk playing World TeamTennis.
Williams was originally slated to play for the Washington Kastles on Monday and Tuesday, but the Kastles has announced that Williams would miss those matches.
The 33-year-old American won 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 with a calendar-year Grand Slam since Steffi Graf in 1988.
