In the face of tennis' reluctance to act on allegations of domestic violence, Nina's stand at the men's Australian Open final was both courageous and important, writes Kate O'Halloran.

MELBOURNE, Australia — A heckler interrupted Alexander Zverev’s Australian Open final speech, appearing to make reference to the allegations of domestic abuse levied against him by two of his former partners, Olya Sharapova and Brenda Patea.

World No. 2 Alexander Zverev was forced to address previous domestic abuse allegations made against him after he was heckled by a member of the crowd after the Australian Open final on Sunday.