Jung Jae-sung

This is a Korean name; the family name is Jung (정 or 鄭).

Jung Jae-sung (Hangul: 정재성, Hanja: 鄭在成) (born August 25, 1982 in Jeonju, North Jeolla) is a male badminton player from South Korea.

Jung started playing badminton at 7, at his local elementary school. He entered the South Korea national badminton team in 2001. His current partner, as of 2006, is Lee Yong-dae.

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2005

Jung won the Thailand Open with his former partner Lee Jae-jin, beating the Danes Lars Paaske and Jonas Rasmussen in the final.

2006

Jung won the Thailand Open together with Lee; they had a walkover in the final against compatriots Lee Jae-jin, with whom Jung won the last Thailand Open, and Hwang Ji-man.

At the Asian Games, Jung and Lee became bronze medalists after losing the semi-finals to Luluk Hadiyanto and Alvent Yulianto of Indonesia in the individual men's doubles event. In the team event, South Korea lost to China in the final 2-3, thus gaining Jung a silver medal.

2007

In January, Jung and Lee participated in the Malaysia Open, the first ever BWF Super Series event. There they got through the first round but had to resign due to injury. However a week later they blew away competition to take the first prize at the Korea Open. Jung and Lee lost to Lee Jae-jin and Hwang Ji-man in the final of the German Open.

Jung participated to the 2007 Sudirman Cup with the South Korea team. The team lost to China in the semi-finals with a score of 0-3.

In July, after a period of disappointing results in men's doubles, Lee became runner-up with Jung at the Thailand Open, losing to Lee Jae-jin and Hwang Ji-man. Not much later, the pair went on to take the silver medal in the 2007 BWF World Championships. They were defeated in the final by Markis Kido and Hendra Setiawan of Indonesia, 19-21, 19-21. The rest of the year also resulted in quite disappointing achievements, not getting past quarterfinals in any major events, except in the French Open. Jung and Lee there lost to the eventual winners, Cai Yun and Fu Haifeng of China.

2008

To start 2008, Jung, together with Lee, disappointingly lost to an unseeded pair in the second round of the Malaysia Open. In Korea, things went a bit better, achieving a quarterfinal. There they lost to runners-up Luluk Hadiyanto and Alvent Yulianto of Indonesia.

More than a month later, Jung and Lee came back with a bang to win the All England Open of 2008, beating Choong Tan Fook and Lee Wan Wah in a thrilling semi-final (coming back from a 16-20 deficit in the third game) and compatriots Lee Jae-jin and Hwang Ji-man in the finals. A week later, the pair were victorious in the Swiss Open of 2008 too.

At the Badminton Asia Championships Jung and Lee became winners, beating Candra Wijaya and Nova Widianto of Indonesia in the final.

Jung and Lee were the only ones to score a point for South Korea against China in the Thomas Cup final, which ended in a 3-1 win for China.

Olympics

Not having participated in the two following Super Series events, supposedly because of their preparations for the Summer Olympics, Jung and Lee were disappointingly knocked out in the first round in Beijing. His partner went on to get the gold medal in mixed doubles.