Quarterfinal field was completed at the Porsche Tennis Grand Prix on Thursday. Jimmie48 is bringing us photos from the second-round matches.
![Jelena Ostapenko of Latvia](https://womenstennisblog.com/wp-content/uploads/2021/04/Jelena_Ostapenko_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-DSC_6074_original.jpg)
Sixth seed Karolina Pliskova hit 21 aces en route to a come-from-behind victory over former Roland Garros champion Jelena Ostapenko, who had defeated the Czech in their previous two encounters.
![Karolina Pliskova of the Czech Republic](https://womenstennisblog.com/wp-content/uploads/2021/04/Karolina_Pliskova_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-DSC_6366_original.jpg)
The world No.52 Ostapenko made nine double faults as Pliskova triumphed 6-7(7) 6-4 6-3 to set up a meeting with top-ranked Ash Barty.
![Aryna Sabalenka of Belarus](https://womenstennisblog.com/wp-content/uploads/2021/04/Aryna_Sabalenka_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-DSC_6609_original.jpg)
Seeking her first career title on clay this week, fifth seed Aryna Sabalenka swept past Germany’s Anna-Lena Friedsam 6-4 6-2.
![Aryna Sabalenka of Belarus](https://womenstennisblog.com/wp-content/uploads/2021/04/Aryna_Sabalenka_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-Z66_0840_original.jpg)
Sabalenka’s quarterfinal opponent will be Anett Kontaveit, who eliminated Sofia Kenin on Wednesday.
![Simona Halep of Romania](https://womenstennisblog.com/wp-content/uploads/2021/04/Simona_Halep_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-DSC_7274_original.jpg)
Back in Stuttgart for the first time since 2018, second seed Simona Halep claimed her first win over Marketa Vondrousova, 6-1 6-3. The world No.2 was playing her first match since withdrawing from the Miami Open because of a shoulder injury.
![Belinda Bencic of Switzerland](https://womenstennisblog.com/wp-content/uploads/2021/04/Belinda_Bencic_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-DSC_7733_original.jpg)
Halep’s quarterfinal opponent will be Ekaterina Alexandrova, as the Russian upset eighth-seeded Belinda Bencic 6-1 7-5.
![Ekaterina Alexandrova of Russia](https://womenstennisblog.com/wp-content/uploads/2021/04/Ekaterina_Alexandrova_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-DSC_7944_original.jpg)
Alexandrova is through to her first claycourt quarterfinal.
![Elina Svitolina of the Ukraine](https://womenstennisblog.com/wp-content/uploads/2021/04/Elina_Svitolina_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-DSC_7374_original.jpg)
Fourth seed Elina Svitolina has now won her last seven encounters with Angelique Kerber, having defeated the German in Stuttgart today, 7-6(4) 6-3. The Ukrainian recovered from 3-1 down in the tiebreak and dominated the second set in every department. Petra Kvitova will be Svitolina’s quarterfinal opponent.
![Elina Svitolina of the Ukraine](https://womenstennisblog.com/wp-content/uploads/2021/04/Elina_Svitolina_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-DSC_7562_original.jpg)
Jimmie48 also attended one doubles match. Ashleigh Barty and Jennifer Brady took out second seeds Zhang Shuai and Xu Yifan in the quarterfinals, 6-4 6-3.
![Ashleigh Barty of Australia & Jennifer Brady of the United States](https://womenstennisblog.com/wp-content/uploads/2021/04/Ashleigh_Barty_Jennifer_Brady_-_2021_Porsche_Tennis_Grand_Prix_Day_4_-DSC_6879_original.jpg)
Keep checking back to Women’s Tennis Blog for more exclusive photos from the Porsche Tennis Grand Prix.