KUALA LUMPUR: National men's singles coach Hendrawan hopes the new service rule, introduced by the Badminton World Federation (BWF), would not affect the performance of Lee Chong Wei at the All England, which starts on Wednesday, in Birmingham.
"Of course, I am a little worried as this will be Chong Wei's first time. In terms of preparations and his physical condition, everything is good.
"My only concern is the new ruling might throw him off his game a little. I want him to remain focused and not let it affect him too much," said Hendrawan.
Under the new ruling, players must make sure the shuttle is not above the 1.15m mark when serving.
The height limit of the shuttle before this was 1.1m.
Hendrawan admitted that Chong Wei — who will play Brazil's Ygor Coelho in the first round — faces a tall order in retaining his title.
"Based on the draw, Chong Wei will not have it easy, but as I have mentioned before, he must stay focused and take it one match at a time."
Should Chong Wei clear the first hurdle, he will likely face Denmark's Jan Jorgensen and China’s Lin Dan in the second round and quarter-finals.
Chong Wei, 36, had previously triumphed in oldest badminton tournament in 2010, 2011, 2014 and 2017.