Who will prevail in the @WTAFinalsSG semifinals matchup between Sloane Stephens and Karolína Plíšková? Sound off with 🇺🇸 or 🇨🇿 below! #WTAFinals 🇸🇬🎾 _ 📸: @sloanestephens 🆚 @karolinapliskova _ #USOpen #wtatennis #tennis #instatennis #wtafinals #singapore #SloaneStephens #KarolinaPliskova #wtafinalssg