Hyderabad, Aug 12 - India's Saina Nehwal and Chetan Anand entered the singles pre-quarterfinals of the World Badminton Championships even as Parupalli Kashyap put up a brave fight against second seed Jin Chen of China before bowing out in the second round here Wednesday.

Saina, who has stepped on the court after recovering from chicken-pox, showed no signs of tiredness as she dispatched Anastasia Prokopenko of Russia 21-10, 21-17 in just 27 minutes.

Anand, seeded 15th, defeated Bulgaria's Stilian Makarski 21-9, 21-7 in 28 minutes. Kashyap looked like pulling off a big upset when he took the first game, but then slipped into a streak of errors and went down 21-14, 10-21, 7-21.

In the men's doubles, Akshay Dewalkar and Jishnu Sanyal lost to 16th seed Russian pair of Vitalij Durkin and Alexandr Nikolaenko 21-17, 13-21, 18-21 in the second round.

Later, Aparna Balan and Shruti Kurian lost their second round match 16-21, 16-21 to second seed Chinese Shu Cheng and Yunlei Zhao.

All the men's top players advanced to the third round without much scare. Top seed Lee Chong Wei beat Ola Fagbemi of Nigeria 21-11, 21-14 while Denmark's Peter Gade defeated Japan's Sho Sasaki 21-11, 21-12.

Sixth seeded Sony Dwi Kuncoro of Indonesia prevailed over Przemyslaw Wacha of Poland 21-12, 21-13.

Women's top seed Zhou Mi defeated Michelle Chan Ky 21-11, 21-15 in 27 minutes.

In the third round, world No 6. Saina will face 10th seeded Petya Nedelcheva of Bulgaria, who beat Aiying Xing of Singapore 26-24, 19-21, 21-16 in a tough encounter.

Saina, India's best medal hope in the tournament, said she had done her homework for the match. Prokopenko was no match for the Indian who engaged her Russian opponent in long rallies before going for the kill.

'I was playing her for the first time.