The Latest: No Olympics spectators at Tokyo venues; Kyrgios withdraws from Games; Australian Open planning for scenarios

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The Tokyo 2020 Olympics will proceed with no spectators in the stands at venues based in the Japanese capital, with authorities extending the city's state of emergency through the Games.

That includes the tennis event, which starts at the front end of the global event in a little more than two weeks. That has prompted at least one withdrawal, Nick Kyrgios, who joins several other players already skipping the tournament for various reasons.

"It's a decision I didn't make lightly. It's been my dream to represent Australia at the Olympics and I know I may never get that opportunity again," Kyrgios posted on social media. "But I also know myself. The thought of playing in front of empty stadiums just doesn't sit right with me."

Competitors, including tennis players, have strict dates for arriving and leaving and will be competing in a bubble, with no private team members allowed. Events staged in northeastern and central Japan are set to still welcome up to 10,000 fans.

Top-ranked Novak Djokovic and Ash Barty are scheduled to compete, as is world No. 2 and home favorite Naomi Osaka.

There are also concerns about potential restrictions for the Australian Open, with Australian Open CEO Craig Tiley saying the ATP and WTA have delayed releasing next year's schedule for another couple of months to allow the Grand Slam event to organize its arrangements.

This season, players were required to do two weeks of quarantine with a few hours allowed for training. Australia still requires travelers to quarantine for two weeks upon arrival, with no current plans to lift the restriction.

Tiley said players would not agree to do quarantine again.

"At this point, in our initial conversation... it's not something they're going to be open to, simply because it's not something they're currently doing around the world," Tiley told Melbourne radio station 3AW in an interview.

He said alternatives would be required if the tournament was to be played in its usual spot, such as the "bubble" in place at Wimbledon.

"I'm very confident the Australian Open will proceed," said Martin Pakula, the Victoria Minister of Sport.

Australian Open officials will speak with federal ministers in addition to regional officials in Victoria.