Badminton Association of Malaysia (BAM) technical director Morten Frost believes that a lack of "match practice and match fitness" is to blame for Lee Chong Wei's second round exit at the Japan Open.
Chong Wei, who had been in red-hot form in the lead-up to the event, was beaten 17-21, 10-21 by arch-rival Lin Dan.
The result will be a disappointing one for Chong Wei as the former world number one recently reached the final of the World Championships in Jakarta.
While Frost admitted that Dan outplayed Chong Wei during the match, he remains confident that the 32-year-old will continue to improve in the lead-up to the 2016 Olympic Games in Rio de Janeiro.
"Lin Dan played a very good match and raised his game," Frost told The Star. "Chong Wei still lacks match practice and match fitness. He could not get his net play going today.
"There are about eight months before the Olympic Games in Rio. There are many more tournaments ahead for Chong Wei…he will only get better."