Tokyo, Jul 23 (AP) Naomi Osaka's opening match in the Olympic tennis tournament has been pushed back from Saturday to Sunday.

Organizers did not immediately provide a reason for the switch. They said only that the move came from the tournament referee.

Osaka was originally scheduled to play 52nd-ranked Zheng Saisai of China in the very first contest of the Games on center court Saturday morning.

One reason for the move could be that Osaka might have a role in the opening ceremony Friday night. That wouldn't leave her much time to rest before a Saturday morning match.

Osaka is returning to competition for the first time in nearly two months after she withdrew from the French Open following the first round to take a mental health break.

She is one of Japan's top athletes. (AP)

(The above story is verified and authored by Press Trust of India (PTI) staff. PTI, India’s premier news agency, employs more than 400 journalists and 500 stringers to cover almost every district and small town in India.. The views appearing in the above post do not reflect the opinions of LatestLY)