Li Na became the latest seeded casualty at the Qatar Open after the Australian Open winner was shocked 6-7, 6-2, 6-4 by the unseeded Petra Cetskovska in the third round.
Na, the top-seed at the tournament after the withdrawal of Serena Williams and Victoria Azarenka, remained favourite to win the title and cap off a remarkable start to the year following the title-winning campaign in Melbourne. However, unforced errors and 10 doubles faults in the match lasting two hours and 46 minutes sealed her early exit on Thursday.
Earlier, fifth-seed Jelena Jankovic completed an easy 6-1, 6-2 win over Alisa Kleybanova. Angelique Kerber, Caroline Wozniacki, Ana Ivanovic, Samantha Stosur and Venus Williams all lost their second round matches on Wednesday.
In the doubles second round matches, the second-seeded pair of Su-Wei Hsieh/Shuai Peng beat Irina Buryachok/Vitalia Diatchenko 6-2, 6-4 while Sania Mirza/Cara Black won 4-6, 6-2, 10-4 against Karolina Pliskova/Kristyna Pliskova.