The Asian swing is in full motion now as the ATP Shanghai Open gets underway on the same day as Tokyo ends with Jannik Sinner taking on teenager Learner Tien.
18:28 CET - Fifth seed Jessica Pegula has advanced in Beijing, with the American surviving a spirited fightback from Marta Kostyuk to prevail 6-3, 6-7(4), 6-1.
That's it for today's action! We'll be back with a new Tennis Tracker tomorrow morning, as the women's quarter-finals get underway in Beijing and the early rounds continue in Shanghai.
16:56 CET - In the final match of the day in Shanghai, Stan Wawrinka has been beaten 6-1, 4-6, 6-4 by Fabian Marozsan in just under two hours.
Sebastian Baez and Yannick Hanfmann have also moved into the next round, with the latter knocking out Lorenzo Sonego.
15:53 CET - Emma Navarro knocks out Iga Swiatek! The top seed has been beaten 6-4, 4-6, 6-0 by the American, who has claimed one of the biggest wins of her career.
That result hurts Swiatek's hopes of ending the year as the world number one.
13:50 CET - Zizou Bergs has secured an impressive win in Shanghai, with the Belgian proving too strong for Sebastian Korda in two competitive sets, 6-4, 7-5.
Yoshihito Nishioka and Valentin Vacherot have also advanced to the next round in China.
13:07 CET - There's been a huge shock in Beijing, with Sonay Kartal producing the performance of her life to defeat fourth seed Mirra Andreeva 7-5, 2-6, 7-5 in a two-and-a-half-hour thriller.
12:02 CET - Experienced Croat Marin Cilic is safely through in Shanghai after a 6-3, 7-6(5) victory over Nikoloz Basilashvili, while Adrian Mannarino has also progressed, seeing off Matteo Berrettini 7-5, 7-6(5).
10:42 CET - Linda Noskova has sealed her spot in the Beijing quarter-finals after a fairly routine 6-2, 6-4 win over Anastasia Potapova.
Meanwhile, at the ATP tournament in Shanghai, Jaume Munar and Jordan Thompson have advanced after three-set victories over Marton Fucsovics and August Holmgren, respectively.
09:35 CET - Top seed Jannik Sinner is the champion in Beijing after a clinical display in the final to see off American teenager Learner Tien in straight sets, 6-2, 6-2.
It's a 21st career title for the remarkable Italian, who has now won 56 of his last 61 matches on the ATP Tour.
08:52 CET - Jannik Sinner has taken a one-sided opening set against Learner Tien in the Beijing final, with the Italian leading 6-2.
Follow the second set with Flashscore.
Meanwhile, play has started in Shanghai, with David Goffin, Luca Nardi and Mattia Bellucci all progressing to the second round.
07:30 CET - Hello and welcome to a big day of tennis in Asia. The Shanghai Open has got underway in the last few minutes as the ATP tour shifts to the next big tournament on the Asian swing.
Big names to look out for on day one in Shanghai include veterans David Goffin, Stan Wawrinka and Marin Cilic, as well as big-serving Italian Matteo Berrettini.
Follow the action from Shanghai here.
Meanwhile, in a little while, world number two Jannik Sinner takes on Learner Tien in the Beijing final, a highly anticipated match and a great experience for American Tien, who is playing in his first ATP final.
Follow the Beijing final here.
Finally, action from Beijing continues on the WTA tour with Iga Swiatek against Emma Navarro headlining.
Elsewhere, Mirra Andreeva, Linda Noskova and Jessica Pegula all take to the court in a fascinating day of action.