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MIAMI, March 22 (Reuters) - Novak Djokovic and Maria Sharapova both survived unscathed but the Sony Open lost two other grand slam champions on Friday when Victoria Azarenka and Juan Martin Del Potro exited the Miami tournament.

MELBOURNE, March 23 (Reuters) - Australia's bad boy of tennis Bernard Tomic has been re-instated into the Davis Cup team after being booted out last year for a perceived lack of commitment.

March 22 (Infostrada Sports) - Results from the Miami Women's Singles Round 2 matches on Friday 11-Nadia Petrova (Russia) beat Zheng Jie (China) 6-3 6-1 28-Sorana Cirstea (Romania) beat Silvia Soler Espinosa (Spain) 2-6 7-5 6-2 6-Angelique Kerber (Germany) beat Francesca Schiavone (Italy) 6-7(5) 6-3 6-2 21-Klara Zakopalova (Czech Republic) beat Anabel Medina Garrigues (Spain) 6-3 7-6(3) 20-Carla Suarez Navarro (Spain) beat Jamie Hampton (U.S.) 5

March 22 (Infostrada Sports) - Results from the Miami Men's Singles Round 2 matches on Friday 19-Alexandr Dolgopolov (Ukraine) beat Nikolay Davydenko (Russia) 6-2 6-3 James Blake (U.S.) beat 24-Julien Benneteau (France) 6-2 6-3 7-Janko Tipsarevic (Serbia) beat Dudi Sela (Israel) 6-2 6-4 Albert Ramos (Spain) beat 12-Juan Monaco (Argentina) 6-2 4-6 6-3 32-Fabio Fognini (Italy) beat Michael Llodra (France) 6-4 6-1 Jurgen Melzer (Austria) beat 31-Mar

March 22 (Infostrada Sports) - Results from the Miami Men's Singles Round 1 matches on Thursday Thomaz Bellucci (Brazil) beat Daniel Brands (Germany) 2-6 6-4 6-2 Aljaz Bedene (Slovenia) beat Benjamin Becker (Germany) 6-4 6-3 Simone Bolelli (Italy) beat Jesse Levine (Canada) 4-6 6-3 7-6(4) Jarkko Nieminen (Finland) beat David Nalbandian (Argentina) 2-6 6-4 6-3 Ivan Dodig (Croatia) beat Lukas Lacko (Slovakia) 4-6 6-0 6-4 Gui

March 22 (Infostrada Sports) - Results from the Miami Women's Singles Round 2 matches on Thursday 19-Venus Williams (U.S.) beat Kimiko Date-Krumm (Japan) 7-6(3) 3-6 6-4 25-Varvara Lepchenko (U.S.) beat Irina Begu (Romania) 6-3 6-4 Romina Oprandi (Switzerland) beat 17-Lucie Safarova (Czech Republic) 7-6(4) 4-6 7-6(5) Andrea Petkovic (Germany) beat 10-Marion Bartoli (France) 6-3 4-1 (Bartoli retired) Magdalena Rybarikova (Slovakia) beat 27-Mona Bart

MIAMI, March 21 (Reuters) - Serena Williams, playing her first match since regaining the world number one ranking, made a triumphant start to the Sony Open, thumping Italy's Flavia Pennetta 6-1 6-1 on Thursday.

March 21 (Infostrada Sports) - Results from the Miami Women's Singles Round 2 matches on Thursday Romina Oprandi (Switzerland) beat 17-Lucie Safarova (Czech Republic) 7-6(4) 4-6 7-6(5) Andrea Petkovic (Germany) beat 10-Marion Bartoli (France) 6-3 4-1 (Bartoli retired) Magdalena Rybarikova (Slovakia) beat 27-Mona Barthel (Germany) 6-3 7-6(5) 9-Caroline Wozniacki (Denmark) beat Karolina Pliskova (Czech Republic) 5-7 6-3 6-3 Garbine Muguruza Blanco (Spain) beat 23-Anastasia

March 21 (Infostrada Sports) - Results from the Miami Men's Singles Round 1 matches on Thursday Aljaz Bedene (Slovenia) beat Benjamin Becker (Germany) 6-4 6-3 Simone Bolelli (Italy) beat Jesse Levine (Canada) 4-6 6-3 7-6(4) Jarkko Nieminen (Finland) beat David Nalbandian (Argentina) 2-6 6-4 6-3 Ivan Dodig (Croatia) beat Lukas Lacko (Slovakia) 4-6 6-0 6-4 Guido Pella (Argentina) beat Carlos Berlocq (Argentina) 2-1 (Berlocq retired) Luk

March 21 (Infostrada Sports) - Results from the Miami Men's Singles Round 1 matches on Wednesday Dmitry Tursunov (Russia) beat Tim Smyczek (U.S.) 7-6(4) 7-5 James Blake (U.S.) beat Ryan Harrison (U.S.) 6-2 6-2 Dudi Sela (Israel) beat Marinko Matosevic (Australia) 6-2 1-6 6-4 Nikolay Davydenko (Russia) beat Paolo Lorenzi (Italy) 6-0 2-6 6-0 Horacio Zeballos (Argentina) beat Thiemo de Ba

March 21 (Infostrada Sports) - Results from the Miami Women's Singles Round 1 matches on Wednesday Bethanie Mattek-Sands (U.S.) beat Monica Puig (Puerto Rico) 6-4 7-5 Francesca Schiavone (Italy) beat Jana Cepelova (Slovakia) 5-7 6-4 6-4 Christina Mchale (U.S.) beat Anett Kontaveit (Estonia) 6-2 6-1 Anabel Medina Garrigues (Spain) beat Alexandra Dulgheru (Romania) 5-7 6-4 7-6(3) Donna Vekic (Croatia) beat Yulia Putintseva (Kazakhstan)

March 20 (Infostrada Sports) - Results from the Miami Men's Singles Round 1 matches on Wednesday Horacio Zeballos (Argentina) beat Thiemo de Bakker (Netherlands) 6-1 3-6 6-3 Jurgen Melzer (Austria) beat Ricardas Berankis (Lithuania) 3-6 6-3 7-6(1) Lleyton Hewitt (Australia) beat Joao Sousa (Portugal) 6-1 7-6(3) Albert Ramos (Spain) beat Jan Hajek (Czech Republic) 6-3 6-1 Igor Sijsling (Netherlands) beat Leonardo Maye

March 20 (Infostrada Sports) - Results from the Miami Women's Singles Round 1 matches on Wednesday Laura Robson (Britain) beat Camila Giorgi (Italy) 6-2 4-6 6-3 Victoria Duval (U.S.) beat Andrea Hlavackova (Czech Republic) 7-6(4) 6-4 Magdalena Rybarikova (Slovakia) beat Mallory Burdette (U.S.) 6-2 6-4 Simona Halep (Romania) beat Sabine Lisicki (Germany) 6-2 3-6 7-5 Karolina Pliskova (Czech Republic) beat Lucie Hradecka (

* Prize money to increase to $50 million by 2017 (Removes redundant word from 1st paragraph)

NEW YORK, March 20 (Reuters) - The U.S. Open will revert back to a 14-day tournament from 2015 after United States Tennis Association (USTA) officials reached an agreement with players on restructuring the playing schedule.

MADRID, March 20 (Reuters) - Spanish doctor Eufemiano Fuentes, on trial for allegedly running a doping ring in cycling, said on Wednesday he may be willing to cooperate with anti-doping authorities and name the clients whose blood was found in bags seized by police.

March 19 (Infostrada Sports) - Results from the Miami Women's Singles Round 1 matches on Tuesday Andrea Petkovic (Germany) beat Bojana Jovanovski (Serbia) 6-3 6-1 Kimiko Date-Krumm (Japan) beat Chanelle Scheepers (South Africa) 6-2 6-0 Peng Shuai (China) beat Sofia Arvidsson (Sweden) 6-3 6-2 Kiki Bertens (Netherlands) beat Anna Tatishvili (Georgia) 6-0 1-0 (Tatishvili retired) Flavia Pennetta (Italy) beat Johanna Larsson (Swed

LONDON, March 19 (Reuters) - Indian Wells runner-up Juan Martin del Potro believes Britain's Andy Murray can become world tennis number one this year.

LOS ANGELES, March 18 (Reuters) - Maria Sharapova rose to number two in the rankings on Monday after her impressive title run at the BNP Paribas Open but says she is motivated much more by grand slam glory than the prospect of regaining the top spot.

Mar 18 (Reuters) - WTA rankings on Monday (last week's positions in brackets): 1. (1) Serena Williams (United States) 10365 points 2. (3) Maria Sharapova (Russia) 10015 3. (2) Victoria Azarenka (Belarus) 9575 4. (4) Agnieszka Radwanska (Poland) 7395 5. (5) Li Na (China) 5880 6. (6) Angelique Kerber (Germany) 5400 7. (8) Sara Errani (Italy) 5160 8. (7) Petra Kvitova (Czech Republic) 5150 9.