Serena Williams survives longest match of her career to reach third round of Madrid Open . World No . 6 beats unseeded Russian Vera Dushevina 6 The 28-year-old was relieved to go through to a tie against either 16th seed Nadia Petrova having squandered a match-point in her semifinal defeat by Jelena Jankovic at the Italian Open on Friday . -7 ( 2-7 ) 7 -6 ( 2-7 ) 6 -6 ( 7-5 ) Russian will next play either Eighth seed Nadia Petrova or Anastasia Pavlyuchenkova . Eighth seed Samantha Stosur wins to set up clash with Maria Jose Martinez Sanchez .
Serena Williams survives longest match of her career to reach third round of Madrid Open . World No . 6 beats unseeded Russian Vera Dushevina 6 -7 ( 2-7 ) 7 -6 ( 2-7 ) 6 -6 ( 7-5 ) Russian will next play either Eighth seed Nadia Petrova or Anastasia Pavlyuchenkova . Eighth seed Samantha Stosur wins to set up clash with Maria Jose Martinez Sanchez .