Beaten by Roger Federer but too strong for Rafael Nadal in the doubles, Nick Kyrgios was at the centre of Saturday's Laver Cup action.
Borna Coric is the last man standing in the way of US Open runner-up Daniil Medvedev earning a rare Russian success in St Petersburg.
The final of the Pan Pacific Open presents Naomi Osaka with the chance to win her first tournament since the Australian Open.
Samantha Stosur's hopes of ending her two-year wait for a WTA Tour title were ended by Sofia Kenin on Saturday.
After Stefanos Tsitsipas' resilient display in the singles, Roger Federer and Alexander Zverev put Team Europe in control at the Laver Cup.
Andrey Rublev has claimed some big scalps in 2019, but came unstuck against US Open runner up Daniil Medvedev in St Petersburg on Friday.
Sam Stosur will return to the world's top 100 after reaching the final at the Guangzhou International Women's Open.
Only one Pan Pacific Open quarter-final was completed on Friday due to the rain in Osaka.
In his first outing since losing in the final at the US Open, Daniil Medvedev brushed aside fellow Russian Evgeny Donskoy.
Zhang Shuai, a two-time WTA Guangzhou Open champion, was upset on Thursday, but Sofia Kenin recovered to advance and Sam Stosur also won.
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)
Kiki Bertens awaits at the Pan Pacific Open for Anastasia Pavlyuchenkova, who was a round-one winner in Osaka.
Having climbed into the WTA's top 100, Kristie Ahn caught the eye again with a swift demolition of Timea Bacsinszky in Seoul.
There were contrasting fortunes for two former title winners in Monday's ATP Tour events, with Mikhail Kukushkin advancing in Russia.
While still unsure over his return, Novak Djokovic is hoping to play at the Japan Open Tennis Championships.
Daria Kasatkina continued to toil against Madison Keys but Donna Vekic made smooth progress in Osaka.
Olympic singles gold is the only major title evading Roger Federer, but his plans only go as far as Wimbledon in 2020.
Wang Qiang succumbed to a first-round loss against Shuai Peng, but Elina Svitolina coasted through at the Guangzhou Open.
After dropping down to the Challenger Tour for the second time this season, Jo-Wilfried Tsonga hit the ground running in Metz.
An expectant crowd were given an early scare before Naomi Osaka pulled through in straight sets at the Pan Pacific Open.