Den Bosch, June 19:

Defending champion Ivan Ljubicic was ousted by Viktor Troicki of Serbia 5-7, 6-4, 7-6 (5) in the second round of the Ordina Open on Wednesday.

Ljubicic had 25 aces and lost his serve only once, but in the third-set tiebreaker he squandered a 3-0 lead and dropped five straight points. Troicki is through to his first quarter-finals since last July at Umag, where he beat Novak Djokovic en route to the semi-finals. Troicki will next face seventh-seeded Guillermo Canas, who beat Rohan Bopanna of India 6-2, 6-4.

Also, Arnaud Clement of France beat Marcel Granollers of Spain 6-7 (6), 6-3, 6-3, and Juan Martin Del Potro of Argentina beat Rainer Schuettler of Germany 7-6 (3), 7-6 (5).

In the women’s event, top-seeded Elena Dementieva of Russia beat Sara Errani of Italy 6-3, 7-5.

Local favorite Michaella Krajicek overpowered Sania Mirza of India 6-2, 6-2, and Katarina Srebotnik beat Chan Yung-jan 6-4, 6-3 but injured her left ankle and had to withdraw from the tournament.

Tamarine Tanasugarn beat Ashley Harkleroad 4-6, 6-4, 7-5 to reach her first q uarter-finals since February at her home event in Pattaya Open in and set up a last-eight match with Krajicek.