Serena Williams is No. 4 seed for U.S. Open
The U.S. Tennis Association announced the seedings Wednesday, strictly following this week's WTA rankings.
Venus Williams, who won the Open in 2000 and 2001, is ranked 47th and is unseeded.
The USTA said Tuesday that Roger Federer is seeded No. 1 among the men.
The draw is Thursday. Play begins Monday.