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.

MELBOURNE, Australia — Jannik Sinner beat Alexander Zverev 6-3, 7-6 (4), 6-3 in the Australian Open final at Melbourne Park Sunday. The No. 1 seed prevailed over the No. 2 seed in a match ultimately decided by Zverev’s discomfort when coming forward, Sinner’s underrated first serve, and a kiss of death from the net.

After getting overrun by Jannik Sinner 6-3, 7-6 (4), 6-3 in the men’s singles final Saturday night to give the world No. 1 player a back-to-back victory in Melbourne, fans called out Zverev for his dark past, referencing two of the German player’s ex-girlfriend’s who have accused him of domestic abuse.

World No. 1 Jannik Sinner defended his Australian Open title on Sunday, comfortably defeating Alexander Zverev 6-3, 7-6(4), 6-3 in the men’s final to secure his third career grand slam win.

Follow reaction as Sinner retained the championship with a brilliant showing against three-time major final loser Zverev on Rod Laver in Melbourne

Jannik Sinner cruised to his second straight Australian Open title and third major overall, beating Alexander Zverev in a one-sided final.

Moments after Alexander Zverev’s loss in the Australian Open final, a person in the stadium yelled out the names of two of the tennis star’s ex-girlfriends who have accused him of physical abuse

Alexander Zverev is heckled over domestic abuse allegations during the trophy ceremony after the Australian Open men's singles final.

Alexander Zverev says he is feeling down and emotional after once again coming within one win of earning his first Grand Slam title.

The 27-year-old German waited for the commotion to die down - the woman was removed by security - and made no reference to the protest in his speech.