Fourth seed Karolina Sprem lost in straight sets to Italy's Maria Elena Camerin at the Gaz de France Stars event in Belgium. Camerin, the world number 45, beat Croatia's Sprem 6-4 6-4 to reach the quarter-finals.
Fellow seeds Francesca Schiavone of Italy and Bulgaria's Magdalena Maleeva made it through to the last eight.
Top seed Elena Dementieva of Russia beat Czech Michaela Pastikova 6-4 6-2 in Thursday's late match.
MMIX
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