Australians Jarmila Groth and Anastasia Rodionova have continued their fine form with first-round victories at the Istanbul Cup.
Fresh off career-best runs at the French Open and Wimbledon, Groth and Rodionova both progressed without dropping a set.
Groth crushed German Anna-Lena Groenefeld 6-2 6-1, while Rodionova breezed past local hope Basak Eraydin 6-1 6-3.
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Groth next faces Russian Anna Lapushchenkova for a place in the quarter-finals and Rodionova will meet Bulgaria's surprise Wimbledon semi-finalist Tsvetana Pironkova.
Fifth-seeded Pironkova downed German Tatjana Malek 7-6 (7-4) 6-2 in her opening match on a day of few problems for the headline acts.
Italy's top-seeded French Open champion Francesca Schiavone outclassed Brit Anne Keothavong 6-2 6-2, while Russian third seed Anastasia Pavlyuchenkova trounced Pole Marta Domachowska 6-1 6-0.
