Serena Williams, of the United States, pumps her fist after winning a point against Francesca Schiavone, of Italy, during the first round of the 2013 U.S. Open tennis tournament, Monday, Aug. 26, 2013, in New York. (AP Photo/Charles Krupa) by Howard FendrichAP Tennis Writer NEW YORK (AP) — A decade or so ago, Serena and Venus Williams ruled tennis together, swapping the No. 1 ranking and meeting in Grand Slam final after Grand Slam final. Serena, the younger of the two, still holds a spot at the top of the game. Venus has not been there for quite some time.