The rivalry between Angelique Kerber and Daria Kasatkina has swung back and forth over the last three years - but today's encounter will be their first off hard courts. Kerber won their first match in the 2016 Montréal quarterfinals, before Kasatkina scored her first two career Top 2 victories over the German in Sydney and Doha the following year. Kerber levelled the head-to-head in Tokyo last September - but the Russian pulled ahead again in their most recent match, an emphatic 6-0, 6-2 defeat in this year's Indian Wells quarterfinals.
Caroline Wozniacki owns a 2-0 head-to-head record over Ashleigh Barty, having defeated the Australian 6-4, 6-2 on hard courts in Cincinnati last year and 6-2, 4-6, 6-4 on the clay of Madrid this year.
When Jelena Ostapenko previously played Agnieszka Radwanska, she was ranked World No.39 to the Pole's World No.4 - and Radwanska scored a straight-sets win, 7-5, 6-1 in the 2016 New Haven second round. Now, Radwanska - playing her first quarterfinal since Sydney in January - is ranked World No.31 to Ostapenko's World No.12.
Aryna Sabalenka has doubled her tally of career Top 20 victories this week, notching up her third and fourth over Julia Goerges and Elise Mertens. The rising Belarusian is 0-2 against Top 10 opponents so far, though - but will have a chance to score a career-best win in her first meeting with Karolina Pliskova.
There are four multiple Eastbourne finalists in this year's quarterfinals: Agnieszka Radwanska (2008 champion, 2015 runner-up), Caroline Wozniacki (2009 champion, 2017 runner-up), Karolina Pliskova (2016 runner-up, 2017 champion) and Angelique Kerber (finalist in 2012 and 2014). By contrast, Daria Kasatkina is the only player remaining who has never played a grass quarterfinal before.
This week marks just the sixth tournament Aryna Sabalenka has played on grass in her career - and the fourth time she has won multiple matches on the surface. Previously, the 20-year-old reached the semifinals of the ITF $100,000 event in Manchester last year, and followed it up by qualifying for Wimbledon and winning a round; two weeks ago, she made her first grass quarterfinal in Mallorca.
ORDER OF PLAY (all courts start 11am)
After 1 ATP match, not before 12.30pm
Aryna SABALENKA (BLR) vs Karolina PLISKOVA (CZE) 
Caroline WOZNIACKI (DEN)  vs Ashleigh BARTY (AUS) 
Jelena OSTAPENKO (LAT)  vs Agnieszka RADWANSKA (POL)
After 2 ATP matches, not before 5pm
Angelique KERBER (GER)  vs Daria KASATKINA (RUS) 
Elise MERTENS (BEL) / Demi SCHUURS (NED) vs Nadiia KICHENOK (UKR) / Ekaterina MAKAROVA (RUS)
After 2 ATP matches
HSIEH Su-Wei (TPE) / Aryna SABALENKA (BLR) vs Andreja KLEPAC (SLO) / María José MARTÍNEZ SÁNCHEZ (ESP)