Playing in the quarterfinals of the 2013 French Open.
Lee took the Korea Open title for the third time. A week later, he captured his ninth Malaysia Open title, which broke the record of eight titles previously held by Wong Peng Soon. Lee then lost in the final of the All England Open to Chen Long. Lee said he was disappointed with his performance during the tournament, despite marching into the final.

In April, he lost in the semi-finals of the Australia Open, to the young Chinese player Tian Houwei. He then won the second India Open title and fifth Indonesia Open. In August, Lee eventually marched into the final of the World Championships, but Lee's hopes were once again dashed in a repeat of his 2011 final and 2010 Asian Games defeat against Lin Dan. He suffered leg cramps late into the third game. After attempting to continue, he had to retire and was subsequently stretchered to hospital.

After the World Championships, Lee participating in four Super Series tournaments. First, he took the Japan Open title for fourth time. Then, he lost in the final of Denmark Open and semifinal of the French Open, and triumph again in the Hong Kong Open.

Lee won record fourth Masters Finals title, the season ending Super Series tournament.

2013[edit]
Doping[edit]
2002–2007[edit]
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