World No 1 Caroline Wozniacki made serene progress to the quarter-finals of the St Petersburg Trophy on Thursday, defeating Anastasia Potapova 6-0, 6-1.
Wozniacki won her first grand slam title last month at the Australian Open, but any concerns that the exertions in Melbourne would have a lingering effect have so far proved misplaced.
The 27-year-old Dane will expect a tougher test in the quarter-finals when she takes on Russia's Daria Kasatkina, who thrashed France's Alize Cornet 6-2, 6-1 in her second round match.
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