Tennis Tracker: Zheng and Kenin move into Tokyo final, Guangzhou semis underway

13:17 CET - The first semi-final in Guangzhou has unfortunately been decided by an injury, with top seed Katerina Siniakova (28) retiring while trailing 4-6, 6-4, 4-3 to Olga Danilovic (23).

09:24 CET - Qinwen Zheng (22) has secured her spot in the Tokyo final with a 7-6, 6-3 win over Diana Shnaider (20).

07:30 CET - Good morning and welcome back to the Tennis Tracker as the weekend gets underway!

Before we look ahead to the rest of the day, there has already been a result from the first semi-final in Tokyo, where ninth seed Katie Boulter (28) has been beaten 6-4, 6-4 by Sofia Kenin (25).

And currently on court battling for the right to appear in the final is No. 1 seed and Chinese superstar Zheng Qinwen (22), who is facing another young starlet, Diana Shnaider (22). You can follow that match with us at Flashscore.

Over in China a little later on another No. 1 seed, Katerina Siniakova (28), takes on Olga Danilovic (23), before Luzia Bronzetti (25) and Caroline Dolehide (26) meet in the other semi.

This afternoon, attentions turn to the ATP Tour, with a host of tasty final-four clashes.

At 14:00 CET, Lorenzo Musetti (22) clashes with Jack Draper (22) in Vienna, while Arthur Fils (20) faces Ben Shelton (22) in what should certainly be an entertaining affair in Basel.

Swiftly after that, last week's Almaty champion Karen Khachanov (28) looks to reach another final, but Alex de Minaur (25) stands in his way in the Austrian capital. 

Switzerland then plays host to a semi-final between Holger Rune (21) and surprise package Giovanni Mpetshi Perricard (21).