A pair of US Open champions go head-to-head with a spot in the @WTAFinalsSG semifinals on the line! Are you Team Kerber or Team Stephens? Comment with 🇩🇪 or 🇺🇸 below! _ 📸: @angie.kerber 🆚 @sloanestephens _ #USOpen #wtatennis #tennis #instatennis #wtafinals #singapore #SloaneStephens #AngeliqueKerber #wtafinalssg