Date-Krumm, Strycova reach U.S. Open semifinals

Date-Krumm, Strycova reach U.S. Open semifinals

NEW YORK, United States - Japan's Kimiko Date-Krumm and partner Barbora Zahlavova Strycova of the Czech Republic cerebrate after defeating Czech Andrea Hlavackova and China's Jie Zheng in the women's doubles at the U.S. Open on Sept. 3, 2014, in New York. The pair won 6-3, 4-6, 6-3 to advance to the semifinals.

BNP Paribas Open tennis

BNP Paribas Open tennis

INDIAN WELLS, United States - Japan's Kimiko Date-Krumm (facing) and Barbora Zahlavova Strycova of the Czech Republic celebrate after defeating Andrea Hlavackova and Lucie Safarova of the Czech Republic 6-2, 7-5 in a first-round women's doubles match at the BNP Paribas Open tennis competition in Indian Wells, California, on March 5, 2014.

Australian Open tennis

Australian Open tennis

MELBOURNE, Australia - Japan's Kimiko Date-Krumm and Spain's Arantxa Parra Santonja touch hands during their Australian Open second-round women's doubles match against Czechs Andrea Hlavackova and Lucie Hradecka in Melbourne, Australia, on Jan. 18, 2013. The Japanese-Spanish pair won and advanced to the third round.

Australian Open tennis

Australian Open tennis

MELBOURNE, Australia - Japan's Kimiko Date-Krumm serves during an Australian Open second round women's doubles match with Spain's Arantxa Parra Santonja (front) against Czechs Andrea Hlavackova and Lucie Hradecka in Melbourne, Australia, on Jan. 18, 2013. The Japanese-Spanish pair won and advanced to the third round.

Serena Williams advances to quarterfinals at U.S. Open

Serena Williams advances to quarterfinals at U.S. Open

NEW YORK, United States - Serena Williams of the United States plays a return shot against Andrea Hlavackova of the Czech Republic during a fourth-round women's singles match at the U.S. Open Tennis Championships in New York on Sept. 3, 2012. Williams won 6-0, 6-0, to advance to the quarterfinals.

Serena Williams advances to quarterfinals at U.S. Open

Serena Williams advances to quarterfinals at U.S. Open

NEW YORK, United States - Serena Williams of the United States acknowledges cheers from spectators after defeating Andrea Hlavackova of the Czech Republic in a fourth-round women's singles match at the U.S. Open Tennis Championships in New York on Sept. 3, 2012. Williams won 6-0, 6-0, to advance to the quarterfinals.

Serena Williams advances to quarterfinals at U.S. Open

Serena Williams advances to quarterfinals at U.S. Open

NEW YORK, United States - Serena Williams of the United States plays a return shot against Andrea Hlavackova of the Czech Republic during a fourth-round women's singles match at the U.S. Open Tennis Championships in New York on Sept. 3, 2012. Williams won 6-0, 6-0, to advance to the quarterfinals.

Williams sisters win doubles at Wimbledon

Williams sisters win doubles at Wimbledon

LONDON, Britain - Venus Williams (back) and her sister Serena Williams of the United States play against Andrea Hlavackova and Lucie Hradecka of the Czech Republic in the women's doubles final at the Wimbledon Championships at the All England Club in London on July 7, 2012. The Williams sisters captured their fifth Wimbledon title with a 7-5, 6-4 victory.

Williams sisters win doubles at Wimbledon

Williams sisters win doubles at Wimbledon

LONDON, Britain - Venus Williams (R) and her sister Serena Williams of the United States hold the winners' trophies after their victory against Andrea Hlavackova and Lucie Hradecka of the Czech Republic in the women's doubles final at the Wimbledon Championships at the All England Club in London on July 7, 2012. The Williams sisters captured their fifth Wimbledon title with a 7-5, 6-4 win.

Clijsters advances to 3rd round at Wimbledon

Clijsters advances to 3rd round at Wimbledon

LONDON, Britain - Kim Clijsters of Belgium returns the ball during a women's singles second-round match of the Wimbledon Championships against Andrea Hlavackova of the Czech Republic at the All England Club in London on June 28, 2012. Clijsters advanced to the third round with a 6-3, 6-3 win.

S. Williams advances to French Open 2nd round

S. Williams advances to French Open 2nd round

Serena Williams of the United States returns a shot in a first-round match against Andrea Hlavackova of the Czech Republic at the French Open tennis tournament in Paris on May 26, 2015. Williams won 6-2, 6-3. (Kyodo) ==Kyodo

S. Williams advances to French Open 2nd round

S. Williams advances to French Open 2nd round

Serena Williams of the United States returns a shot in a first-round match against Andrea Hlavackova of the Czech Republic at the French Open tennis tournament in Paris on May 26, 2015. Williams won 6-2, 6-3. (Kyodo) ==Kyodo

Date-Krumm, Strycova reach U.S. Open semifinals

Date-Krumm, Strycova reach U.S. Open semifinals

NEW YORK, United States - Japan's Kimiko Date-Krumm and partner Barbora Zahlavova Strycova of the Czech Republic cerebrate after defeating Czech Andrea Hlavackova and China's Jie Zheng in the women's doubles at the U.S. Open on Sept. 3, 2014, in New York. The pair won 6-3, 4-6, 6-3 to advance to the semifinals. (Kyodo)