As the U.S. Open begins today, the women’s title is considered up for grabs, with perhaps half a dozen serious title contenders. And yet this Grand Slam, just like women’s tennis as a whole, is in many ways all about the Williams sisters. Only one active player owns more major singles titles than Venus Williams’ six: Serena Williams, with eight.

Vick’s day in court

Michael Vick’s guilty plea to federal dogfighting charges will cap one of the most rapid and startling falls from stardom in U.S. sports history. The Atlanta Falcons quarterback is scheduled to formally enter his plea today, following the path of three co-defendants who already have pleaded guilty. In Vick’s written plea agreement filed in federal court Friday, he admitted helping kill six to eight pit bulls and supplying money for gambling on the fights. All that’s left is for U.S. District Judge Henry E. Hudson to accept the plea and decide how much time Vick will spend in prison and for the NFL to determine the fate of Vick’s career.