National men’s singles coach Hendrawan said they were monitoring the All England champion’s condition and a decision would be made after assessing his fitness level.

“Zii Jia tried his best, no discussion about tactics and strategy because Zii Jia is also tired mentally. This is a new experience for him … how he can continue and manage fatigue.

“As for his back injury, he has a few days to rest. We will make a decision at the 11th hour and if he still isn’t fully recovered, perhaps he will skip the Indonesia Masters,” he said.

Second seed Zii Jia was trailing 21-19, 13-21, 12-17 in the final against Singapore’s unseeded Loh Kean Yew when he retired due to a lower back injury in the deciding game.

The Indonesia Masters, scheduled from Nov 16-21, is the first of three back-to-back tournaments in Indonesia under the Badminton World Federation (BWF) World Tour calendar.

The other two tournaments are the Indonesia Open (Nov 23-28) and World Tour Finals (Dec 1-5). All three tournaments are to be held in Bali.

After that, attention will shift to the World Championships in Huelva, Spain from Dec 12-19.