At Roland Garros today, both Serena and Venus were sent packing.

Venus lost to Anastasia Myskina, one of the young Russian stars, and Serena lost to Capriati.

"This year I really made it tough on myself by not performing and making a lot of errors ... and by basically not doing anything on a professional level," Serena said. "I was an amateur today." Said her mom Oracene: "Serena was totally awful."

The Williams sisters are probably the most athletic and talented women ever to grace the court. If they really put their mind to it, they could dominate the tour for the foreseeable future. But for the last year, they haven't played to their potential, in part due to injuries, in part due to their other interests.

The questions will start now, especially for Serena: are they spending too much time acting like Hollywood celebs? Too much time designing clothes and reading scripts? Too much time at Cannes? Too much time dating NFL players? Not enough time on the court practicing?

After the Williams' great run from 2000-03, the rest of the players raised their level of play. It's time for Venus and Serena to respond.