Indonesia’s former world boxing champion Chris John announced his retirement from the ring in Jakarta on Thursday, two weeks after he lost the WBA Super World featherweight title to IBO king Simpiwe Vetyeka.

At the title bout in Perth, Western Australia, on Dec. 6, Chris' corner threw the towel in after the sixth of 12 rounds against the tough South African.

It was Chris’s only defeat in his fight record, which saw him win 48 (22 KOs) and draw three.

Chris said that the Vetyeka fight was testament to the decline in his physical shape.

“From the last round, I felt I was beginning to drop in stamina. That may be due to my age,” said the 35-year-old, as quoted by Antara.

He had previously signaled his plan to hang up his gloves at the age of 35. “This is the time to step back,” he said.

He said he had discussed his retirement with his trainer Australian Craig Christian.

“My trainer supports my decision because of my condition,” he said.

He said he would sort out his future with his management.