Last year's runner-up Argentina got opening singles wins from David Nalbandian and Juan Monaco on Friday, as the host Germans trail their South American counterparts 2-0 in a best-of-five opening-round Davis Cup affair.

Playing without its world No. 1 superstar Novak Djokovic, Serbia jumped out to a commanding 2-0 lead over visiting Sweden in a best-of-five opening-round Davis Cup affair.

Wimbledon champion Petra Kvitova will not play in next week's Qatar Ladies Open due to an unspecified injury.

Wimbledon Open champion Petra Kvitova has pulled out of the Qatar Ladies Open because of an unspecified injury.

Roger Federer was jolted at the Davis Cup with a four-set loss to John Isner on Friday, leaving the United States ahead 2-0 in the first-round series.

Mardy Fish outlasted Stanislas Wawrinka in a five-set thriller Friday, as the visiting United States grabbed a 1-0 lead against Switzerland in their best-of-five opening-round Davis Cup showdown.

Ivo Karlovic beat Kei Nishikori 6-4, 6-4, 6-3 Friday to give Croatia a split against Japan in the first round of the Davis Cup.

Defending champion Daniela Hantuchova was among the quarterfinal winners Friday at the Pattaya Open, while two-time winner Vera Zvonareva was forced to retire from her match because of a hip injury.

Croatia and Japan split the opening singles matches in their first-round Davis Cup tie on Friday.

Defending champion Daniela Hantuchova ousted Vania King of the United States 7-6 (7), 6-4 Friday to reach the semifinals at the Pattaya Open.

Top-seeded Maria Sharapova was ousted from the Open GDF Suez on Friday, beaten by Angelique Kerber 6-4, 6-4 in the quarterfinals.

French crowd favorite Marion Bartoli was an easy second-round winner Thursday in Paris.

Former Australian Open runner-up Jo-Wilfried Tsonga will get France going Friday in its opening-round Davis Cup tie against host Canada.

Chilean star Fernando Gonzalez says he expects to retire from the ATP World Tour next month.

Roger Federer will face John Isner in the second singles match Friday when Switzerland takes on the United States in the first round of the Davis Cup.

Mike Davies, the chief executive officer of the New Haven Open tennis tournament, has been elected to the International Tennis Hall of Fame.

Chilean tennis star Fernando Gonzalez says he will retire next month because injuries no longer allow him to play at a top level.

The Southern California franchise in the World TeamTennis Pro League is getting a new name and home court for the upcoming season.

The Spanish government is considering legal action against a French TV station that poked fun at alleged ties to doping by athletes.

Novak Djokovic has met his match.

Last year's runner-up Argentina will battle host Germany in an opening-round Davis Cup tie this weekend.

An opening-round Davis Cup tie between the United States and host Switzerland will commence Friday when American Mardy Fish takes on Swiss slugger Stanislas Wawrinka.

Reigning champion Spain will begin defense of its Davis Cup title with a 2012 opening-round tie against Kazakhstan this week, as the festivities will get underway Friday with a singles rubber between former world No. 1 Juan Carlos Ferrero and Mikhail Kukushkin.

Defending champion Daniela Hantuchova of Slovakia and American Vania King were among the second-round winners Thursday at the Pattaya Open.