A man in his 50s who has the Japan Pro Boxing Association’s club owner license in Osaka, western Japan, was found to be suffering from the novel coronavirus respiratory disease, or COVID-19, the Japan Boxing Commission said on July 17.

The man, whose name and the gym were withheld, showed a positive reaction through a polymerase chain reaction test held the same day and entered the follow-up assessment period. He has a fever and has a feeling of weariness, according to the JBC.

Two professional boxers and one amateur boxer belonging to the gym also showed the occurrence of fever together with one trainer. Currently the gym has been closed.

In the boxing world, two pro boxers and as many trainers in Aichi Prefecture, central Japan, developed fever in April. One pro boxer in Tokyo was found to have been suffering from COVID-19 via a PCR test earlier this month.