Roddick edges by Greul to reach quarterfinals

Sampras, who retired after winning the 2002 US Open for his record 14th Grand Slam singles title, plans to play in about a half-dozen WTT matches.

Venus Williams will play for the Philadelphia Freedoms, Martina Navratilova the Boston Lobsters, and Anna Kournikova the Sacramento Capitals. The defending champion New York Sportimes protected their rights to John McEnroe and Martina Hingis.

The season is from July 6-30, with the finals at Newport Beach, California.