There have been some big surprises at the Mutua Madrid Open this week, including Sam Stosur's loss.
The No.9-seeded Stosur ran into Carla Suárez Navarro and some of her tireless retrieving Monday.
Suárez Navarro was down set point in the first set tie-break but went on to beat Stosur, 76(7) 62.
The Spanish No.1 is one of the most tenacious players out there - it was her seventh Top 10 win.
And Stosur wasn't the only big name in trouble Monday - No.4 seed Agnieszka Radwanska also went out.
Radwanska lost to Laura Robson, 63 61. Robson scored her first Top 5 win and third Top 10 win.
In her first match in almost two months, Victoria Azarenka overcame Anastasia Pavlyuchenkova.
Marion Bartoli came into Madrid in a bit of trouble - she had lost her last four matches in a row.
The No.14-seeded Frenchwoman snapped out of it, actually winning her first two matches of the week.
Anabel Medina Garrigues also won her first two matches, including against giant-killer Madison Keys.
Svetlana Kuznetsova also moved into the third round, beating No.11 seed Nadia Petrova en route.
Azarenka's second round match started well, as she took the first set on Ekaterina Makarova, 6-1.
But Makarova would end up winning in three sets, putting an end to Azarenka's perfect start to 2013.
Maria Sharapova took some time out Wednesday to promote her delicious new candy line, Sugarpova.
Sharapova had already reached the third round and would win that third round match on Thursday.
Robson's run through the draw ended in the third round, though, at the hands of Ana Ivanovic.
But the British teenager had her chances - she led the former World No.1 in the third set, 5-2.
Sharapova won a tight two-setter against Sabine Lisicki on Thursday to make the quarterfinals.
Varvara Lepchenko wasn't so lucky, leading early but eventually succumbing to Sara Errani, 75 63.
Kaia Kanepi was one of the last players into the quarterfinals, beating Daniela Hantuchova Thursday.