The newlywed Keys, whose husband and coach is former American tennis player Bjorn Fratangelo, said after some much needed sleep, they'll be "back to work on Monday" to prepare for "lots of tournaments" including the BNP Paribas Open at Indian Wells and the Miami Open back to back in March.

In total, Sinner has won 36 of his last 37 matches, his only defeat coming against Carlos Alcaraz in the final of October’s China Open.

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.

Madison Keys of the United States has upset two-time defending champion Aryna Sabalenka of Belarus 6-3, 2-6, 7-5 in the Australian Open final.

Madison Keys won her first ever grand slam title on Saturday, stunning two-time defending champion and world No. 1 Aryna Sabalenka 6-3 2-6 7-5 in a thrilling Australian Open women’s final.

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

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