Даяна ЯСТРЕМСКАЯ разнесла экс-первую ракетку Мугуруcу! Yastremska shocks Muguruza 6-2, 6-3

That moment when you get the biggest win of your career!18y.o Dayana Yastremska shocks Garbine Muguruza 6-2, 6-3 to reach the quarterfinals @WTAlux...