Tennis - Seeds tumble in Dubai, Pennetta shocks Radwanska

Italy’s Flavia Pennetta stunned world number three Agnieszka Radwanska in straight sets to earn a surprise spot in the quarter-finals of the Dubai Tennis Championships.

Pennetta, who narrowly avoided being dumped out in the first round of qualifying, reeled off eight consecutive games to turn an ominous 4-1 deficit in the opening set into a commanding position.

Radwanska eventually brought the one-way traffic to a halt by breaking for 3-1 in the second set, but that proved the Pole’s final victorious game as Pennetta raced home for a 6-4 6-1 triumph.

"It was the first time I've beaten her in six years - I thought I would never beat her again," said Pennetta.

"But today I played really well. My idea of what I had to do was clear, and I tried to go for the points all the time.

"I made a few mistakes in the beginning - I was down 4-1, but every game was a big fight - but I kept going and stayed aggressive and it worked in the end."

And the seeds tumbled across the draw as Spain’s Carla Suarez Navarro and Romania’s Sorana Cirstea claimed the scalps of third seed Petra Kvitova and fourth seed Sara Errani respectively.

Defeat looked inevitable for Navarro when the Spaniard trailed 6-1 4-2, but she responded magnificently to force a deciding set, eventually sealing the match 1-6 6-4 7-6(4).

World number 27 Cirstea beat Errani 6-2 5-7 6-1.

"Every single time against her I would come close but never get the win, but tonight I kept fighting and playing aggressive until the end," said Cirstea.

"I never changed my game plan, no matter what the score was. I'm happy because I kept doing that until the end, and that's what gave me the win."

Fifth seed Jelena Jankovic and eighth seed Caroline Wozniacki progressed to the last eight with straight-set victories.

Results from the Dubai Championships Women's Singles Round 2 matches

Carla Suarez Navarro (Spain) beat 3-Petra Kvitova (Czech Republic) 1-6 6-4 7-6(4)

Sorana Cirstea (Romania) beat 4-Sara Errani (Italy) 6-2 5-7 6-1

Alize Cornet (France) beat Kirsten Flipkens (Belgium) 6-3 6-4

5-Jelena Jankovic (Serbia) beat Lucie Safarova (Czech Republic) 7-5 6-4

Venus Williams (U.S.) beat Ana Ivanovic (Serbia) 6-2 6-1

8-Caroline Wozniacki (Denmark) beat Annika Beck (Germany) 6-4 6-4

Flavia Pennetta (Italy) beat 2-Agnieszka Radwanska (Poland) 6-4 6-1

Results from the Rio de Janeiro Open Women's Singles matches

Round 2

1-Klara Zakopalova (Czech Republic) beat Silvia Soler Espinosa (Spain) 6-4 6-1

Nastassja Burnett (Italy) beat Alison Van Uytvanck (Belgium) 0-6 6-3 6-2

Katarzyna Piter (Poland) beat Dinah Pfizenmaier (Germany) 5-7 6-3 6-1

3-Paula Ormaechea (Argentina) beat Kiki Bertens (Netherlands) 7-5 7-5

Round 1

5-Kurumi Nara (Japan) beat Hsieh Su-Wei (Taiwan) 6-3 6-2

Anna-Lena Friedsam (Germany) beat Nadiya Kichenok (Ukraine) 6-2 6-3