Indian Wells - Novak Djokovic rebounded eight days after suffering his first loss of 2012, with the world number one racing into the third round of the Indian Wells Masters on Saturday with an efficient 6-3, 6-2 defeat of Kazak Andrey Golubev.
Djokovic lost for the first time this season in Dubai as he went down to Andy Murray in a semi-final. The Serb is defending the Masters 1000 title in the Californian desert, one of 10 he claimed in a runaway 2011 campaign.
The top seed will next face South African Kevin Anderson, who advanced through a walkover after German Philipp Kohlschreiber fell ill.
Fourth-seeded Murray crashed to defeat as Spain's Guillermo Garcia-Lopez produced a 6-4, 6-2 upset win. It was the Scot's second straight loss at the event in an opening match after reaching the 2009 final.
Czech number seven Tomas Berdych defeated Sergiy Stakhovsky 6-7 (2-7), 6-3, 6-4.
Twom home seeds advanced with number eight Mardy Fish winning 6-3, 3-2, as Italian Andreas Seppi retired with a stomach problem and 11th seed John Isner defeating Frederico Gil of Portugal 7-5, 6-3.
Nicolas Almagro spoiled the day for Californian Sam Querrey 5-7, 6-4, 6-4.
Frenchman Gilles Simon, seeded 13th, beat Dudi Sela 7-5, 6-7 (6-8), 6-4 and will play next against Stanislas Wawrinka, who made the tough switch from clay to hardcourt with a 4-6, 6-4, 6-4 comeback over number 211 American Robby Ginepri.
Spain's Albert Ramos dispatched 16th seed Richard Gasquet 3-6, 7-5, 6-1, Australian Matthew Ebden beat Julien Benneteau 2-6, 6-3, 6-2 and Argentine Juan Monaco eliminated Nicolas Mahut 6-4, 5-7, 6-3.
In women's play, number two Maria Sharapova led a parade of seeds in advancing.
The number two and three-time Grand Slam champion thrashed Gisela Dulko 6-2, 6-0 with six breaks of serve.
Fourth seed Caroline Wozniacki beat Russian Elena Makarova in a 6-2, 6-0 rout.
"I don't like to be out there for too long if I don't have to," said the winner in 68 minutes. "I like to play tennis and I love grinding it out, but if I have the opportunity to finish it off fast, I like that opportunity, as well."
US Open winner Samantha Stosur of Australia crushed Irina Falconi with the loss of just three games, while 2010 Roland Garros champion Francesca Schiavone, seeded 10th, beat Lesya Tsurenko 6-2, 6-4.
Ana Ivanovic, who won Paris four years ago, took revenge for a French Open first round loss last year as she hammered Johanna Larsson 6-1, 6-2.
The 15th-seeded Serb, who stood number one in the world four years ago, earned her decisive victory to repay the Swedish player who upset her in May 2011.
Wimbledon semi-finalist Sabine Lisicki, the number 11, went down in a second-round upset to Lourdes Dominguez Lino of Spain 6-1, 6-4. Slovak 16th seed Dominika Cibulkova won as compatriot Magdalena Rybarikova retired after three games, handing over a 2-1 win.
Results from the fourth day of the BNP Paribas Open ATP/WTA tournament on Saturday (x denotes seeding):
Novak Djokovic (SRB x1) bt Andrey Golubev (KAZ) 6-3, 6-2
John Isner (USA x11) bt Frederico Gil (POR) 7-5, 6-3
Matthew Ebden (AUS) bt Julien Benneteau (FRA x32) 2-6, 6-3, 6-2
Kevin Anderson (RSA x29) bt Philipp Kohlschreiber (GER) walkover, illness
Albert Ramos (ESP) bt Richard Gasquet (FRA x16) 3-6, 7-5, 6-1
Pablo Andujar (ESP) bt Florian Mayer (GER x18) 6-2, 6-4
Nicolas Almagro (ESP x12) bt Sam Querrey (USA) 5-7, 6-4, 6-4
Andy Roddick (USA x30) bt Lukasz Kubot (POL) 4-6, 7-6 (7/5), 6-3
Tomas Berdych (CZE x7) bt Sergiy Stakhovsky (UKR) 6-7 (2/7), 6-3, 6-4
Stanislas Wawrinka (SUI x23) bt Robby Ginepri (USA) 4-6, 6-4, 6-4
Gilles Simon (FRA x13) bt Dudi Sela (ISR) 7-5, 6-7 (6/8), 6-4
Juan Monaco (ARG x22) bt Nicolas Mahut (FRA) 6-4, 5-7, 6-3
Mardy Fish (USA x8) bt Andreas Seppi (ITA) 6-3, 3-2 retired
Ryan Harrison (USA) bt Viktor Troicki (SRB x25) 7-6 (7/5), 6-3
Santiago Giraldo (COL) bt Kei Nishikori (JPN x17) 7-5, 6-2
Guillermo Garcia-Lopez (ESP) bt Andy Murray (GBR x4) 6-4, 6-2
Chanelle Scheepers (RSA) bt Kaia Kanepi (EST x29) 6-3, 6-2
Ana Ivanovic (SRB x15) bt Johanna Larsson (SWE) 6-1, 6-2
Sofia Arvidsson (SWE) bt Monica Niculescu (ROM x26) 6-3, 6-3
Lourdes Dominguez (ESP) bt Sabine Lisicki (GER x11) 6-1, 6-4
Dominika Cibulkova (SVK x16) bt Magdalena Rybarikova (SVK) 2-1, retired, illness
Francesca Schiavone (ITA x10) bt Lesia Tsurenko (UKR) 6-2, 6-4
Samantha Stosur (AUS x6) bt Irina Falconi (USA) 6-0, 6-3
Roberta Vinci (ITA x21) bt Silvia Soler (ESP) 6-3, 6-3
Simona Halep (ROM) bt Petra Cetkovska (CZE x28) 6-2, 6-4
Caroline Wozniacki (DEN x4) bt Ekaterina Makarova (RUS) 6-2, 6-0
Nadia Petrova (RUS x30) bt Lauren Davis (USA) 6-3, 6-2
Ksenia Pervak (KAZ) bt Peng Shuai (CHN x17) 6-4, 6-0
Maria Kirilenko (RUS x20) bt Irina-Camelia Begu (ROM) 7-6 (7/4), 6-4
Lucie Safarova (CZE x23) bt Tamira Paszek (AUT) 6-3, 3-1, retired
Marion Bartoli (FRA x7) bt Varvara Lepchenko (USA) 2-6, 6-2, 7-5
Maria Sharapova (RUS x2) bt Gisela Dulko (ARG) 6-2, 6-0