Jankovic and Kuznetsova survive scares

Second seed Jankovic was pushed before recording a 6-3 6-7 (5/7) 7-5 triumph over Sofia Arvidsson, while former world number one and 1998 champion Davenport posted a 7-5 6-3 second-round triumph over Russian Alisa Kleybanova.

Third seed Kuznetsova got off to a shaky start before registering a 7-6 (7/3) 6-1 victory over Sorana Cirstea, while eighth seed Vera Zvonareva became the highest-seeded player to be sent packing at the year's final major after falling 6-3 6-3 to Tatiana Perebiynis.

Jankovic, who recently lost the world's top ranking after holding it for just a week, looked like she would cruise into the third round, but the 23-year-old Serb squandered a 3-0 lead in the second set before letting slip a similar lead in the tiebreak.

But in a tense third set which featured some brilliant tennis, Jankovic finally put away the match when world number 63 Arvidsson sent a backhand long for her 54th unforced error to bring to an end the two hour 45 minute contest.

"It was really tough. I am completely out of breath," said Jankovic. "I was pushed to the limit. The last time I played her, she was up 5-1 in the third and I had to come back."

A quarter-finalist at last year's US Open, Jankovic next faces Wimbledon semi-finalist Zheng Jie of China.

Zvonareva was her own worst enemy, committing 30 unforced errors in an embarrassing performance against the world's 71st-ranked player who made it to the third round at major for the first time since Wimbledon in 2004.

Swiss 15th seed Patty Schnyder also advanced with a 6-3 6-3 win over Anastasia Pavlyuchenkova, while newly crowned Olympic champion Elena Dementieva coasted into the third round with a 6-2 6-1 destruction of Pauline Parmentier in under an hour.

The Russian fifth seed will next face British number one Anne Keothavong, a 6-2 3-6 6-4 winner over 25th seed Francesca Schiavone.