BASEL, Switzerland, Aug. 23 -- Olympic champion Chen Long was knocked out of the Badminton World Championships by Denmark's Anders Antonsen in the quarterfinals here on Friday.

Chen, also a two-time world champion, took a dominant lead at 20-18 in the first set but Antonsen, who won only once in their six previous meetings, saved two set points and served to win 22-20.

The 22-year-old controlled the second set, winning 21-10 to reach the last four for the first time in his career.

Chen's loss leaves China to have no player in the world championships semifinals for the first time since 1995.

"I just thought that I could easily take the win when I was leading 20-18," Chen said. "But in the blink of an eye, he scored four points in a row and won the first set."

"I need to learn from this lesson," said the 30-year-old, who won the bronze in last year's competition.

Top seed and defending champion Kento Momota of Japan breezed past Lee Zii Jia of Malaysia 21-12, 21-8, Sai Praneeth, the 16th seed, upset fourth seed Jonatan Christie of Indonesia 24-22, 21-14 and Thailand's Kantaphon Wangcharoen shocked second seed Chou Tien Chen of Chinese Taipei 21-16, 11-21, 21-14.

Praneeth became the first Indian men's singles player in 36 years to medal at the World Championships. He will face Momota on Saturday while Wangcharoen takes on Antonsen.

"It feels awesome to be a medallist," Praneeth said. "It's a big moment for me and I hope it's a turning point in my career."

【体坛英语资讯：Olympic champion Chen Long knocked out by Antonsen in badminton worlds quarters】相关文章：

★ 体坛英语资讯：Nurnberg see unwilling draw at Dortmund

★ 娱乐英语资讯：Tom Cruise and wife set to move to New York

★ 娱乐英语资讯：Bruce Willis and Ving Rhames to reteam in sci-fi thriller

★ 体坛英语资讯：Did Yi get an All-Star snub?

★ 体坛资讯：Dujkovic wants to lead China to 2010 World Cup

★ 娱乐英语资讯：Nicholson says hes looking for love

★ 体坛英语资讯：McLarens Kovalainen still in hospital after crash

★ 体坛英语资讯：China confident of derailing talented Brazil

★ 娱乐英语资讯：Lindsay Lohan checks out of rehab: report

★ 体坛英语资讯：Olympic champion Zhang scared at ProTour Finals