WTA Korea Open

Friday

At Olympic Park

Seoul, South Korea

Purse: $226,750 (Intl.)

Surface: Hard-Outdoor

Singles

Quarterfinals

Karolina Muchova (3), Czech Republic, def. Priscilla Hon, Australia, 6-3, 6-3.

Wang Yafan, China, def. Paula Badosa, Spain, 6-1, 6-3.

Ekaterina Alexandrova (2), Russia, def. Kristie Ahn, United States, 6-7 (0), 6-4, 6-4.

Magda Linette (4), Poland, def. Kirsten Flipkens, Belgium, 6-2, 6-3.

WTA Pan Pacific Open

Friday

At ITC Tsuyoshi Tennis Center

Osaka, Japan

Purse: $823,000 (Premier)

Surface: Hard-Indoor

Singles

Quarterfinals

Angelique Kerber (4), Germany, def. Madison Keys (5), United States, 6-4, 4-6, 2-1 retired.

Anastasia Pavlyuchenkova, Russia, leads Misaki Doi, Japan, 2-0, susp.

Doubles

Semifinals

Hsieh Su-wei and Hsieh Yu-chieh, Taiwan, lead Nadiia Kichenok, Ukraine, and Abigail Spears, United States, 6-5, susp.

WTA Guangzhou Open

Friday

At Tianhe Sports Center

Guangzhou, China

Purse: $500,000 (Intl.)

Surface: Hard-Outdoor

Singles

Semifinals

Sam Stosur, Australia, def. Viktorija Golubic, Switzerland, 2-6, 7-6 (4), 6-1.

Sofia Kenin (3), United States, def. Anna Blinkova, Russia, 7-6 (2), 4-6, 6-1.

Doubles

Semifinals

Alexa Guarachi, Chile, and Giuliana Olmos, Mexico, def. Aleksandra Krunic, Serbia, and Lidziya Marozava (3), Belarus, 7-6 (3), 6-3.

Peng Shuai, China, and Laura Siegemund, Germany, def. Duan Yingying and Yang Zhaoxuan (2), China, 6-4, 6-0.

ATP World Tour Metz

Friday

At Arenes de Metz

Metz, France

Purse: €524,340

Surface: Hardcourt indoor

Seedings in parentheses

Men’s Singles

Quarterfinal

Aljaz Bedene, Slovenia, def. Pablo Carreno Busta, Spain, 6-4, 7-5.

Benoit Paire (3), France, def. Gregoire Barrere, France, 7-6 (4), 6-4.

Lucas Pouille (4), France, def. Filip Krajinovic, Serbia, 4-6, 7-5, 6-2.

Jo-Wilfried Tsonga, France, def. Nikoloz Basilashvili (2), Georgia, 5-7, 6-3, 4-1, ret.

Men’s Doubles

Semifinal

Robert Lindstedt, Sweden, and Jan-Lennard Struff, Germany, def. Aisam-ul-Haq Qureshi, Pakistan, and Santiago Gonzalez (4), Mexico, 6-4, 7-6 (2).

ATP World Tour

St. Petersburg

Friday

At Sibur Arena

St. Petersburg, Russia

Purse: $1,180,000

Surface: Hardcourt indoor

Seedings in parentheses

Men’s Singles

Quarterfinal

Borna Coric (4), Croatia, def. Casper Ruud (8), Norway, 3-6, 7-5, 6-3.

Joao Sousa, Portugal, def. Mikhail Kukushkin (6), Kazakhstan, 7-6 (8), 6-2.

Egor Gerasimov, Belarus, def. Matteo Berrettini (3), Italy, 7-6 (5), 7-6 (3).

Daniil Medvedev (1), Russia, def. Andrey Rublev (5), Russia, 6-4, 7-5.

Men’s Doubles

Semifinal

Simone Bolelli and Matteo Berrettini, Italy, def. Sander Gille and Joran Vliegen (2), Belgium, 7-5, 7-5.