The Sudirman Cup was Lee's first tournament after serving an eight-month suspension for a doping violation. He went on to win all three matches he played in the tournament. He then took back to back titles by winning the US Open and Canada Open. Lee again had to settle for the second at the World Championships as he lost to Chen Long in the final.

After the World Championships, Lee endured three early round exits. First, in the second round of the Japan Open, followed by the qualifying rounds of the Korea Open, and then in the second round of Denmark Open.

After three early round losses, Lee bounced back to win the French Open, followed by his first ever China Open title, thus making him the first ever men's singles shuttler to have won all Super Series titles. The following week, Lee won the Hong Kong Open. However Lee did not qualify for the Super Series Finals. Therefore, ending the year with three back-to-back titles.

Awards[edit]
2015[edit]
2009[edit]
Achievements[edit]