MONTREAL (AFP) - Reigning French Open champ Ana Ivanovic was sent crashing out of the WTA Rogers Cup, losing her third-round match to unseeded Austrian Tamira Paszek 6-2, 1-6, 6-2.

Top seed Ivanovic dropped her first two service games against Paszek to fall behind 4-0 in the final set. She also lost three service games in the opening set before winning the second.

"It was very frustrating because I didn't know how it was going to pull up; I was in pain through the whole match," Ivanovic said.

"The pain wasn't so sharp but I couldn't hold my racquet on my forehand.

"I tried to fight as much as I could. I really wanted to win this match. But obviously she's a very good player. She figured it out."

Paszek avenged a 7-5, 6-1 loss three years ago in Linz when she was just 14-years-old. Paszek is ranked 94th in the world.

"The first thing I was thinking was, 'Well girl, you made it. It's over now,'" Paszek said.

"The second thing was that it was the first top 10 player I've beaten. I've had a lot of chances before and played some great matches but never did that. It was also the first night match I won in my career.

"So there were a lot of first times today. I don't know how, but I managed it."

The 17-year-old Austrian will face the No. 11 seed Victoria Azarenka of Bulgaria, who moved on after unseeded Frenchwoman Virginie Razzano retired while trailing 7-6 (7/4), 2-0 in the hardcourt tournament.

On the other half of the draw, second seeded Serb Jelena Jankovic breezed to a 6-3, 6-2 third-round win over Canadian Stephanie Dubois to seize a spot in the quarter-finals.

For the second consecutive match, Jankovic faced a partisan Canadian crowd.

In the previous round she easily dispatched Canada's Aleksandra Wozniak 6-0, 6-4. Dubois was attempting to reach just her second WTA quarter-final.

Jankovic will next face giant killer Daniela Cibulkova, who beat Russian fifth seed Elena Dementieva and No. 12 Nadia Petrova of Russia in earlier rounds.

Fourth seed Svetlana Kuznetsova and No. 7 Dinara Safina - a pair of hard-hitting Russians - are set to meet in a quarter-final showdown after winning their third-round matches Thursday.

Kuznetsova was forced to go the distance with 15-year-old Michelle Larcher De Brito of Portugal, but came away with a 7-5, 2-6, 6-4 victory in that third-round match.

Safina, who is 23-3 with two titles since the start of May, knocked off No. 9 Patty Schnyder to book a meeting with Kuznetsova.