LUXEMBOURG (AP)—Top-seeded Victoria Azarenka of Belarus defeated Barbora Zahlavova Strycova of the Czech Republic 6-2, 6-4 Wednesday to reach the second round of the Luxembourg Open.

She was joined by fifth-seeded Ana Ivanovic of Serbia, who defeated France’s Virginie Razzano 7-6 (2), 6-4.

The biggest seed to fall Wednesday was No. 5 Flavia Pennetta of Italy, who lost to Anastasija Sevastova of Latvia 6-3, 6-2.

Sixth-seeded Julia Goerges of Germany earned a place in the quarterfinals by defeating Tamira Paszek of Austria, 6-4, 6-2. Iveta Benesova of the Czech Republic also advanced to the quarter after seventh-seeded Maria Kirilenko of Russia withdrew from their match because of an injury.