Ecstasy Hearts

Ecstasy Hearts is a romance webtoon created by SilentMaru, it is about a girl named Shimizu Anya who often has a one-sided rivalry with a boy named Axel.

Synopsis
''Shimizu Anya is the daughter of the two former top Tennis Players of the world. And now, it's her time to conquer the domain of Professional Tennis at least until her destined rival came and completely crushed her before she could even break out of her bubble. This is where her one-sided rivalry begins.''