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The former world number one, who dropped to 102nd in the world rankings being out of action for nine months because of a shoulder injury, needed a set to find her range on Court One before cracking winners past the world number 64.

Yakimova called on the tournament's trainer at change of sides at 4-1 in the second set to have her lower back massaged and she never seemed to recover.

Sharapova, who returned to singles play last week at the Warsaw Open where she reached the last eight, will next face 11th-seeded compatriot Nadia Petrova.

Venus Williams kept a cool head in scorching conditions to reach the second round with a 6-1 4-6 6-2 win over fellow American Bethanie Mattek-Sands.

The third seed appeared to be in a hurry to get back into the cooler confines of the locker room when she romped through the first set in just 34 minutes.

But Mattek-Sands delayed Williams on court for almost two hours before the 28-year-old sealed victory with a thumping forehand winner.

Williams, who owns seven grand slam trophies but has never triumphed at Roland Garros, will next face Lucie Safarova of the Czech Republic, who downed Germany's Sabine Lisicki 6-1 2-6 6-1.



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Time Match

10:00 Del Potro v Llodra
10:00 Troicki v Qualifier 11
10:00 Navarro v Beck
10:00 Gicquel v Schüttler
11:00 Qualifier 14 v Qualifier 15
11:30 Korolev-Gimeno-Traver v
11:30 Dabul v Qualifier 13
11:30 Lapentti v Djokovic
11:30 Reynolds v Monfils
12:00 Kohlschreiber v Tomic
12:00 Ferrero v Ljubicic
12:30 Robredo v Mannarino
12:30 Gonzalez v Fish
13:00 Benneteau v Tsonga
14:00 Tursunov v Clement
14:00 Baghdatis v Monaco
14:00 Garcia-Lopez-Seppi v
15:00 Santoro v Rochus
15:30 Blake v Qualifier 16
16:30 Pavel v Haas
10:00 Dechy v Bammer
10:00 Sugiyama v Rezai
10:00 Jankovic v Cetkovska
10:00 Rybarikova v Mladenovic
10:00 Kuznetsova v Feuerstein
10:00 Voskoboeva v Mirza
10:00 Sevastova v Czink
10:00 Santangelo v Martic
12:00 Ruano Pascual v Vaidisova
12:30 Razzano v Hantuchova
13:30 Koukalova v Williams
14:00 Makarova v Medina Garrigues
14:00 Dokic v Sprem
14:00 Scheepers v Dementieva
14:45 Wickmayer v Radwanska
14:45 Kutuzova v Ondraskova
15:00 Cornet v Ani
16:00 Safarova v Schiavone
16:00 Peng v Martinez Sanchz
16:30 Gullickson v Cirstea