Kasatkina is starting to play better this summer after a very slow start to 2019. Led 51 in the tiebreak and it got wild
She started with 3DF so it was NID that from there she will push her serve , she won a 4th round at at a slam with that serve.h:Dasha's first serve was like what 70mph? In the the middle of the court. She has no chance against anyone decent.