An expectant crowd were given an early scare before Naomi Osaka pulled through in straight sets at the Pan Pacific Open.
After dropping down to the Challenger Tour for the second time this season, Jo-Wilfried Tsonga hit the ground running in Metz.
Wang Qiang succumbed to a first-round loss against Shuai Peng, but Elina Svitolina coasted through at the Guangzhou Open.
Olympic singles gold is the only major title evading Roger Federer, but his plans only go as far as Wimbledon in 2020.
Daria Kasatkina continued to toil against Madison Keys but Donna Vekic made smooth progress in Osaka.
While still unsure over his return, Novak Djokovic is hoping to play at the Japan Open Tennis Championships.
Plenty of thrilling sporting events are happening this week! For Astro Sports Pack customers, here's a handy guide on what to look out for in the next few days... (coverage is subject to change)
There were contrasting fortunes for two former title winners in Monday's ATP Tour events, with Mikhail Kukushkin advancing in Russia.
Having climbed into the WTA's top 100, Kristie Ahn caught the eye again with a swift demolition of Timea Bacsinszky in Seoul.
Kiki Bertens awaits at the Pan Pacific Open for Anastasia Pavlyuchenkova, who was a round-one winner in Osaka.
Kim Clijsters, the former world number one, has announced plans for a surprise WTA return after a seven-year absence from tennis.
After competing in the Zhuhai Championships and China Open, Andy Murray will stay in the Far East to compete in the Shanghai Masters.
Kristyna Pliskova suprisingly lost to Peng Shuai in Nanchang, while Alison Van Uytvanck saw off compatriot Kirsten Flipkens in Hiroshima.
All matches scheduled to be played at the Zhengzhou Open on Thursday were pushed back to Friday due to rain.
Darren Cahill will be back in Simona Halep's corner next year after taking a hiatus to spend more time with his family in Australia.
After seven years away, Kim Clijsters has announced plans for a sensational return to tennis. We look at the other great WTA Tour comebacks.
Andy Murray, 32, was asked about renewing his battle with the ATP's 'Big Three' as he prepares to feature in the singles circuit in Asia.
Having failed to win a title since teaming up with Jermaine Jenkins in February, Naomi Osaka has ended their partnership.
Tournament organisers hope the WTA Tour's Hong Kong Open can be rescheduled when ongoing protests are over.