Kento Momota, the world's top-ranked men's badminton player, has tested positive for COVID-19, causing the Japanese national team to cancel its trip to the Thailand Open.

The two-time reigning world champion, one of Japan's biggest gold-medal hopes at this year's Olympics, returned a positive test result before flying to Bangkok at Tokyo's Narita International Airport with the Japanese team, Japan's state broadcaster NHK reported.

NHK added that the 26-year-old Momota joined his teammates at the Japanese national training center on Saturday after spending New Year's Eve at his hometown in Japan's Kagawa Prefecture.

The whole Japanese national team has canceled its flight to Bangkok after Momota's positive result was confirmed, the NHK said.

Just a year ago, Momota sustained a broken right eye socket in a traffic accident just hours after he won the Malaysia Masters.