No. 2 seed Alexander Zverev reached the Australian Open quarterfinals for the fourth time by beating No. 14 Ugo Humbert 6-1, 2-6, 6-3, 6-2 with the help of 19 aces and a 43-23 advantage in total winners on Sunday night.

World number two Alex Zverev overcame a mid-match wobble and the baseline power of Ugo Humbert to reach the Australian Open quarter-finals with a 6-1 2-6 6-3 6-2 win on Sunday.

There are three American men aged 23 and under in the second week of a Grand Slam. That hasn't happened since 2003

Two friends from California, Learner Tien and Alex Michelsen, have both reached the fourth round at the Australian Open

Two of four American men still playing in Melbourne, Irvine native Tien, 19, and Aliso Viejo native Michelsen, 20, became friends on the youth tennis circuit

Carlos Alcaraz has reached his 10th career Grand Slam quarterfinal, tied for the most by a man before his 22nd birthday, by advancing at the Australian Open when 15th-seeded Jack Draper stopped playing because of injury after dropping the first two sets of their fourth-round match.

It's time for the eighth installment of the riveting, intergenerational rivalry between Novak Djokovic and Carlos Alcaraz. This one, though, will be the first at the Australian Open — and the first in the quarterfinals of a tournament;

Novak Djokovic moved into the fourth round with his most confident performance of the week,against the 26th-seeded Tomas Machac.

Daniil Medvedev is fined over £60,000 for unsportsmanlike conduct following his on-court antics at this year's Australian Open.

Daniil Medvedev has been fined a large chunk of his Australian Open prize money for unsportsmanlike conduct at the year's opening Grand Slam, included a racket-smashing meltdown in the first round.

Daniil Medvedev has been fined a total of $76,000 for his camera and racket smashing outbursts during the first two rounds of the Australian Open