
In January 2014, Lee lost in the final of Korea Open to Chen Long, his fourth straight defeat by the Chinese.[134] He recorded his tenth Malaysia Open title a week later. Soon after the triumph, he announced this would be his last Malaysia Open outing, as he would assess his condition after the Asian Games and may retire if the results are not good.[135]
Further, he won his third All England Open and India Open title respectively.[136][137] However, he was stunned by Simon Santoso in final of the Singapore Open.[138]Lee won every match he contested during the Thomas Cup campaign, Malaysia reached the finals, only losing to Japan with a score of 3–2.[139]
In June, he won the Japan Open for the third consecutive year and fifth time overall.[140] He lost in the semifinals of the Indonesia Open, this also ended his hope of nine straight Super Series finals.[141]
In August, Lee came second for the third time at the World Championships, losing to Chen Long of China in straight sets.[142]