Shin Baek Choel and Ko Sung Hyun's title defence lasted only two rounds after they suffered a surprise defeat at the Badminton World Championships ©BWF

Defending men’s doubles champions Shin Baek Choel and Ko Sung Hyun of South Korea crashed out of the Badminton World Championships, suffering a shock second round defeat to Malaysian duo Goh V Shem and Tan Wee Kiong in Jakarta today.

The South Korean pair came into the tournament having won the Indonesian Open at the same venue in June but were never allowed to stamp their authority on proceedings as Goh and Tan produced a near-perfect performance, emerging with a 21-12, 21-15 triumph.

“We followed our game plan well and we kept our focus and did not make mistakes,” Tan said.

It proved to be a day of surprises in the men’s doubles competition as number four seeds Chai Biao and Hong Wei of China were also eliminated from the event, losing to Japan’s Takeshi Kamura and Keigo Sonoda.

The Japanese pair recovered from dropping the first game to claim a famous 18-21, 21-17, 21-13 win, while their country then got the better of China once again when Hirokatsu Hashimoto and Noriyasu Hirata beat Cai Yun and Lu Kai 12-21, 21-18, 23-21.

Indian number two seed Saina Nehwal breezed to a comfortable victory over Ozge Bayrank
Indian number two seed Saina Nehwal breezed to a comfortable second round victory over Turkey's Ozge Bayrak at the Badminton World Championships in Jakarta ©Getty Images

In the men’s singles, fourth seed Kento Momota of Japan eased to a confident 21-14, 21-9 success against Canada’s Martin Giuffre to set up a meeting with Vietnam’s Nguyen Tien Minh, who overcame a tough test provided by India’s Kashyap Parupalli.

South Korea’s Son Wan Ho, seeded at number nine for the Championships, needed three games to edge past home favourite Dionysius Hayom Rumbaka as he eventually progressed to the next round by virtue of a 12-21 21-13 21-17 scoreline.

Malaysia’s Lee Chong Wei, a former world number who only returned to the sport in May after an eight-month ban for doping, is also through after he proved too strong for 12th seed Marc Zwiebler of Germany.

The women’s doubles also threw up a shock result as Malaysia's Glasgow 2014 Commonwealth Games gold medallists Vivian Hoo Woon and Khe Wei were unable to deal with the stout defensive play of Japanese pair Kurumi Yonao and Naoko Fukuman, losing in straight games 21-13, 21-11.

There were no such issues for the top seeds in the women’s singles draw as India’s Saina Nehwal, Thailand’s Ratchanok Intanon and Tai Tzu Ying of Taiwan all sealed their progression into the third round. 

Number two seed Nehwal cruised to a commanding 21-13, 21-9 victory over Cheung Ngan Yi of Hong Kong.

Intanon, seeded fourth, also breezed to a comfortable win by beating Ozge Bayrak of Turkey 21-14, 21-9.

Chinese Taipei's Tai was made to work slightly harder before he managed to oust Chen Jiayuan of Indonesia's neighbours Singapore 21-18, 21-11 much to the disappointment of the home crowd.

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