A TENNIS star won a match with an underarm serve that aced her opponent. Ukrainian Marta Kostyuk progressed to the Miami Open Round of 16 with a 6-2 6-1 win over Russian Anna Blinkova. Kostyuk ...

WATCH:Marta Kostyuk defeats Varvara ... The eighth-seeded Kostyuk and the unseeded Gracheva, a 22-year-old Russian, did not meet at the net for the traditional post-match handshake; Kostyuk ...