CINCINNATI, OH, USA – And then there were eight! It’s quarterfinal Friday at the Western & Southern Open in Cincinnati. Chris Oddo previews the match-ups for wtatennis.com.

Friday, Quarterfinals

Center Court
[2] Angelique Kerber (GER #2) vs. [9] Carla Suárez Navarro (ESP #12)
Head-to-head: Kerber leads, 4-3

Key Stat: Kerber could ascend to the No.1 ranking with the title in Cincinnati.
Angelique Kerber is focused on the day-in, day-out aspects of being a top WTA pro. The rest of us? We’re curious to see if the German has what it takes to end Serena Williams’ remarkable 183-week reign atop the WTA’s rankings. Kerber could achieve that milestone with a title run, but it’s the furthest thing from her mind at the moment. While we watch the story unfold on Friday when Kerber meets Carla Suárez Navarro for a spot in the semis, the World No.2 will be concentrating on process. “On the court I’m really trying to focus and play my best tennis,” she said on Thursday after defeating Barbora Strycova in straight sets. “And my goal is always to go on court and win the match. Of course I mean it’s a goal to be one day the No.1, but let’s see if it happens, when it happens, whatever. I will not be putting this pressure on myself – I’m just trying to play step by step.” It’s the best way to proceed for Kerber, and so far in Cincinnati she has been able to deflect the pressure and play the type of tennis that got her to this point. Will she be able to continue her rise against the feisty Spaniard who defeated her earlier this summer in Birmingham? Or will Suárez Navarro, already one of three Premier 5 titlists this season, make her own story unfold?

Pick: Suárez Navarro in three

[3] Simona Halep (ROU #4) vs. [5] Agnieszka Radwanska (POL #5)
Head-to-head: Radwanska leads, 5-4

Key Stat: Halep stretched her win streak to 12 with a straight-sets victory over Daria Gavrilova on Wednesday.
Red-hot Simona Halep is loving life in Cincinnati. And why shouldn’t she be? The Romanian is well-rested, suited aptly for the fast-playing conditions at the Lindner Family Tennis Center, and gaining confidence with each successive victory. Halep made it 12 in a row on Thursday when she rolled past Aussie qualifier Daria Gavrilova, and afterwards she cited her legs as the biggest contributor to her recent success. She says her recent training block with Gil Reyes, former trainer of Andre Agassi, has helped her fitness immensely, and she also confirmed that the injuries that sabotaged her play early in the season are behind her. It all adds up to a very formidable Halep, one that is looking more and more like a title contender each day. She’ll have to be formidable on Friday if she is to get by No.5-seeded Agnieszka Radwanska. Radwanska reached her fourth Cincinnati quarterfinal in five years on Thursday by coming from behind to defeat Johanna Konta in three sets. Will Radwanska be able to stop the run of surging Halep in their 10th meeting, or will the Romanian’s scorching form prove too much to handle yet again?

Pick: Halep in three

Grandstand
[7] Svetlana Kuznetsova (RUS #10) vs. [15] Karolina Pliskova (CZE #17)
Head-to-head: First meeting

Key Stat: Kuznetsova improved to 15-4 in deciding sets this year with her win third-round win over Timea Bacsinszky.
It has been a fantastic season for 31-year-old Svetlana Kuznetsova. She achieved her first win over a reigning world No.1 since 2009 in Miami when she snapped Serena Williams’ 20-match winning streak at the event. And that’s not even the half of it. Kuznetsova, now the top-ranked Russian and inside the Top 10 for the first time since 2010, has won 30 matches, claimed her 16th career title, and been a threat to go deep in every draw she has played. Occupying the 10th spot in the Road to Singapore standings, the Russian is playing for valuable points in the next months, and she’ll look to continue pushing her momentum forward when she meets 15th-seed Karolina Pliskova for the first time on Friday. The bomb-serving Czech still hasn’t made her mark at the Slams but she has been lethal elsewhere, with four semifinals, two finals and a title to her name this season. Here in Cincinnati, she has yet to drop a set in two matches.

Pick: Kuznetsova in three

[4] Garbiñe Muguruza (ESP #3) vs. [Q] Timea Babos (HUN #41)
Head-to-head: Muguruza leads, 3-0

Key Stat: Their last two battles have gone to three sets.
There is fire in the eyes of Garbiñe Muguruza this week in Cincinnati, and that’s bad news for her competitors. The Spaniard had an understandable dip in level after winning her maiden Grand Slam in Paris this year, but she appears to be very determined to put that behind her as she prepares to ramp up her game ahead of the year’s final major. Muguruza has yet to drop a set in Cincinnati and though she was pushed at times by Anastasia Pavlyuchenkova on Thursday, she played a very solid match, particularly from the service stripe where she saved six of seven break points and won 31 of 41 first-serve points. On Friday she’ll face one of the tour’s most improved players in 23-year-old Timea Babos. The Hungarian produced an upset on Thursday in defeating eighth-seeded Dominika Cibulkova. It was the Hungarian’s biggest win of the year rankings-wise, but she’s 1-10 against the Top 10 lifetime and 0-3 against Muguruza. She’ll need something magical to push past a resurgent Muguruza on Friday.

Pick: Muguruza in two

By the numbers…
306 – Number of weeks that Serena Williams has held the No. 1 ranking, which is third-most all time behind Martina Navratilova (332) and Steffi Graf (377).ber of consecutive weeks that Serena Williams has held the No. 1 ranking, which is third-most all time behind Martina Navratilova (332) and Steffi Graf (377).
41 – Babos’ position in the world rankings – the lowest of the draw’s eight remaining players.
19-2 – Halep’s record since the start of Roland Garros this year.
7 – Number of seeded players that have advanced to the quarterfinals in Cincinnati.