Veteran coach Ricardo Sanchez says that Serena Williams and Venus Williams have essentially lost their interest in tennis and are more concerned with outside pursuits. Sanchez, who is now coaching Nadia Petrova, has also coached Jelena Jankovic and Caroline Wozniacki.

"The thing about Venus and Serena is they do not want to play [tennis]," he told El Pais. "They compete now just to make the London Games. They are more into celebrity and fashion. If Serena [played consistently] she would be the best in the world. The Williams are like sprinters—they cannot stand the long rallies, and if you get four balls back, they can’t play. When you go from there, they die."

Sanchez also added that Victoria Azarenka's No. 1 spot is in danger even though she has improved her forehand, and that No. 2 Maria Sharapova "hasn't improved anything in the last five years." He also said that he likes No. 3 Petra Kvitova's forehand and serve, but that her backhand is weak and that on clay, she has mobility problems because of her size.