The Washington Kastles will join World TeamTennis this summer, playing home matches in a 2,020-seat temporary stadium set up in a parking lot where the city's convention center used to stand at 11th and H Streets.

Since World TeamTennis began in the 1970s, Billie Jean King often was approached about setting up shop in the nation's capital. Well, in a nearby suburb, anyway. Finally, someone came forward with a plan to put a team right smack dab in the heart of downtown D.C. -- and that made it a perfect fit, as far as King is concerned.

Top-seeded Anabel Medina Garrigues defeated Sesil Karatantcheva 3-6, 7-6 (4), 6-1, advancing to the quarterfinals of the Grand Prix SAR La Princesse Lalla Meryem.

Rafael Nadal made a smooth start to his bid for a fourth consecutive Barcelona Open title as he powered to a 6-4, 6-2 win over Italy's Potito Starace in the second round.

Top-seeded Paul-Henri Mathieu cruised into the third round of the BMW Open with a 6-3, 6-4 win over qualifier Gianluca Naso.

Wild-card entrant Karolina Pliskova rallied to defeat eighth-seeded Kaia Kanepi 1-6, 6-3, 7-5 Wednesday and advanced to the quarterfinals of the Prague Open.

Maria Sharapova pulled out of next week's German Open because of an unspecified injury, and Daniela Hantuchova also withdrew from the clay-court tournament.

Maria Sharapova pulled out of next week's German Open because of an unspecified injury, and Daniela Hantuchova also withdrew from the clay-court tournament. Sharapova, the Australian Open champion, has not played since losing to Serena Williams in the quarterfinals of the Family Circle Cup on April 19.

Jelena Dokic, once ranked No. 4 in the world and now unranked after missing two years with injuries, made a quick exit Tuesday in the first round of the Grand Prix Sar La Princesse Lalla Meryem.

Third-seeded David Nalbandian rallied to defeat Agustin Calleri 1-6, 7-6 (2), 6-3 in an all-Argentine matchup in the second round of the Barcelona Open on Tuesday. Wild-card entrant Mario Ancic beat seventh-seeded Andy Murray 6-4, 6-4. Rafael Nadal, the defending three-time tournament champion who won a fourth straight Monte Carlo Masters title last week, opens against Potito Starace on Wednesday.