MIAMI, March 26: Maria Sharapova rallied from a set down to defeat Venus Williams 2-6, 6-2, 7-5 as the top four women's seeds advanced to the fourth round of the Sony Ericsson Open on Sunday.

Joining Sharapova in the last 16 were compatriot and defending champion Svetlana Kuznetsova and Belgian pair Kim Clijsters and Justine Henin.

Sunday’s results (prefix number denotes seeding):

Men’s singles:

Third round: Juan Martin Del Potro (Argentina) beat 16-Mikhail Youzhny (Russia) 7-6 (7-2), 6-4; Paul-Henri Mathieu (France) beat 5-Fernando Gonzalez (Chile) 6-3, 7-6 (8-6); 3-Andy Roddick (US) beat 32-Gilles Simon (France) 6-4, 6-4; 13-David Ferrer (Spain) beat Simone Bolelli (Italy) 7-6 (7-0), 6-2; 10-Novak Djokovic (Serbia) beat Michael Llodra (France) 6-4, 6-1; Feliciano Lopez (Spain) beat Florent Serra (France) 7-6 (7-4), 6-3; 2-Rafael Nadal (Spain) beat 30-Olivier Rochus (Belgium) – walkover; 12-Andy Murray (Britain) beat Robert Kendrick (US) 6-3, 6-1.

Second round: Fabrice Santoro (France) beat 27-Carlos Moya (Spain) 7-6 (7-5), 6-2; Florian Mayer (Germany) beat 28-Fernando Verdasco (Spain) 7-6 (7-5), 6-1; 24-Radek Stepanek (Czech Republic) beat Gaston Gaudio (Argentina) 6-3, 6-2; 29-Nicolas Almagro (Spain) beat Potito Starace (Italy) 7-6 (7-2), 6-3; 4-Nikolay Davydenko (Russia) beat Simon Greul (Germany) 6-4, 6-0; 6-Tommy Robredo (Spain) beat Kevin Kim (US) 6-2, 6-4; Amer Delic (US) beat 31-Jose Acasuso (Argentina) 6-0, 6-3.

Women’s singles:

Third round: 8-Nicole Vaidisova (Czech Republic) beat Victoria Azarenka (Belarus) 6-3, 6-3; 1-Maria Sharapova (Russia) beat Venus Williams (US) 2-6, 6-2, 7-5; 24-Tathiana Garbin (Italy) beat Yaroslava Shvedova (Russia) 4-6, 6-3, 6-2; 3-Svetlana Kuznetsova (Russia) beat Jelena Kostanic Tosic (Croatia) 6-4, 6-2; 18-Vera Zvonareva (Russia) beat 16-Daniela Hantuchova (Slovakia) 6-2, 6-4; 14-Shahar Peer (Israel) beat Julia Vakulenko (Ukraine) 7-6 (7-5), 7-5; 2-Justine Henin (Belgium) beat Virginie Razzano (France) 6-2, 2-6, 7-6 (7-5); 32-Mara Santangelo (Italy) beat 7-Jelena Jankovic (Serbia) 2-6, 7-6 (7-3), 6-4; Vera Dushevina (Russia) beat Kaia Kanepi (Estonia) 6-1, 6-1; Agnieszka Radwanska (Poland) beat 5-Martina Hingis (Switzerland) 4-6, 6-3, 6-2; 9-Anna Chakvetadze (Russia) beat 17-Tatiana Golovin (France) 6-1, 6-3; 6-Nadia Petrova (Russia) beat Ekaterina Bychkova (Russia) 6-1, 6-1; 4-Kim Clijsters (Belgium) beat 25-Samantha Stosur (Australia) 6-4, 6-2; 10-Dinara Safina (Russia) beat 22-Ai Sugiyama (Japan) 6-4, 3-6, 6-1; 15-Li Na (China) beat 20-Katarina Srebotnik (Slovenia) 6-0, 6-1.

Saturday’s results:

Men’s singles:

Second round: Guillermo Canas (Argentina) beat 19-Juan Carlos Ferrero (Spain) 6-7 (5-7), 6-3, 7-5; 1-Roger Federer (Switzerland) beat Sam Querrey (US) 6-4, 6-3; 14-Tomas Berdych (Czech Republic) beat Arnaud Clement (France) 6-4, 6-1; 11-David Nalbandian (Argentina) beat Vince Spadea (US) 6-3, 6-4; 23-Juan Ignacio Chela (Argentina) beat Janko Tipsarevic (Serbia) 6-2, 6-2; Alejandro Falla (Colombia) beat 9-Tommy Haas (Germany) 6-4, 6-4; 15-Richard Gasquet (France) beat Sebastien Grosjean (France) 6-4, 0-6, 6-2; 7-Ivan Ljubicic (Croatia) beat Filippo Volandri (Italy) 6-3, 6-2; 20-Jarkko Nieminen (Finland) beat Evgeny Korolev (Russia) 6-0, 6-0.

Women’s singles:

Second round: Yaroslava Shvedova (Russia) beat 12-Ana Ivanovic (Serbia) 7-5 6-4; 3-Svetlana Kuznetsova (Russia) beat Katerina Bondarenko (Ukraine) 7-6 (7-4), 6-7 (5-7), 6-3; 13-Serena Williams (US) beat Anastassia Rodionova (Russia) 6-3, 6-3; 14-Shahar Peer (Israel) beat Catalina Castano (Colombia) 6-2, 6-1; Venus Williams (US) beat 29-Maria Kirilenko (Russia) 6-3, 6-3; 8-Nicole Vaidisova (Czech Republic) beat Michaella Krajicek (Netherlands) 4-6, 7-5, 6-2; Julia Vakulenko (Ukraine) beat 19-Francesca Schiavone (Italy) 3-6, 7-6 (7-0), 6-4; 1-Maria Sharapova (Russia) beat Chan Yung-Jan (Taiwan) 6-3, 6-2; Jelena Kostanic Tosic (Croatia) beat 28-Alona Bondarenko (Ukraine) 6-3, 7-5; Victoria Azarenka (Belarus) beat 26-Anabel Medina (Spain) 6-4, 7-5; 24-Tathiana Garbin (Italy) beat Ashley Harkleroad (US) 6-3, 6-2; Vera Dushevina (Russia) beat 21-Marion Bartoli (France) 7-6 (7-5), 2-6, 6-4; 23-Lucie Safarova (Czech Republic) beat Emilie Loit (France) 6-0, 7-5; 5-Martina Hingis (Switzerland) beat Iveta Benesova (Czech Republic) 6-3, 6-2; Kaia Kanepi (Estonia) beat 11-Patty Schnyder (Switzerland) 6-1, 6-4; Agnieszka Radwanska (Poland) beat 27-Zheng Jie (China) 6-3, 6-4.—Reuters