2018 Nature Valley InternationalAryna Sabalenka vs. Karolina Pliskova By Eastbourne Tennis Staff Posted on 28/06/2018 Aryna Sabalenka stunned defending champion and former world number one Karolina Pliskova to reach the semi-finals at Eastbourne.Seventh-ranked Pliskova fell 6-3 2-6 7-6 (7-5) to the Belarusian at the Nature Valley International.