Just my two cents worth.. I always thought the sisters won doubles with their style of power not with a lot of strategy .. As you get older and the service is lacking the punch, Its paramount to stick the volleys and really have to time the cross to neutralized the baseliner returner. I think if they would abandon the stagger formation and try to both take the net, they would put so much pressure on the other team. That is a lot but that is how I was taught to win at doubles. Still a great effort by Vee and Serena.