Lee Zii Jia crashed out in the first round of the French Open after a 22-24, 14-21 loss to Loh Kean Yew.
His straight-game loss to the Penang-born Singaporean came on the back of several sub-par performances.
Lee's form had been indifferent since the Tokyo Olympics, as he did well to beat Kento Momota once at the Sudirman Cup, and pushed the world number one to the wire before narrowly losing at the Thomas Cup.
He then suffered straight-game losses against Anthony Ginting and Viktor Axelsen.
Malaysia's challenge in the men's singles also ended with his defeat after Liew Daren also lost against Japan's Kante Tsuneyama.
Meanwhile in the mixed doubles, Tan Kian Meng-Lai Pei Jing won 21-18, 21-15 against Danish duo Jeppe Bay-Sara Lundgaard to book a meeting with Supak Jomkoh-Supissara Paewsampran.
Other matches saw Chen Tang Jie-Peck Yen Wei put up a fighting display against second seeds Praveen Jordan-Melati Oktavianti before bowing out 20-22, 19-21.
In the women’s doubles, the new pairing of Lee Meng Yean-Yap Cheng Wen beat Ukrainians Mariia Stoliarenko-Yelyzaveta Zharka 21-12, 21-17.
They were joined in the second round by Pearly Tan-M. Thinaah, who defeated British pair Jessica Hopton-Jessica Pugh 23-21, 21-10.
An all-Malaysian men’s doubles match saw fourth seeds Aaron Chia-Soh Wooi Yik beat the new combination of Goh V Shem-Low Juan Shen 25-23, 21-12.
The world number eight pair will next face either Supak-Kittinupong Kedren or Lucas Corvee-Ronan Labar.