Felling no issues, Sinner dominated world no. 8 Alex de Minaur in the quarter-final, earning a 6-3, 6-2, 6-1 victory and remaining on the title course. Speaking about Jannik's problems, Vagnozzi cited headache and stomach issues.

Defending champion and No. 1 seed Jannik Sinner easily dispatches host country's last hope; Ben Shelton takes on-court interviewers to task.

Earlier in the day, Iga Swiatek cruised past Emma Navarro 6-1, 6-2 in their Women’s Singles quarter-final while Madison Keys secured a surprising 3-6, 6-3, 6-4 victory over Elina Svitolina to set up a meeting with Swiatek tomorrow.

World No. 1 Jannik Sinner turned in a near-perfect performance to advance to the semifinals of the Australian Open after beating Alex de Minaur 6-3, 6-2, 6-1.

Jannik Sinner’s journey to defend his Australian Open crown advances as he dispatched hometown hero Alex de Minaur in straight sets, booking his place in the semi-finals.

The World No. 1, despite feeling unwell in sweltering conditions, kept up his title defense with a four-set triumph.

In the Australian Open quarterfinals on Tuesday, Jannik Sinner faces Alex de Minaur.In his most recent match on Sunday, Sinner took down Holger Vitus Nodskov Rune in four sets, 6-3, 3-6, 6-3, 6-2,

Defending champion Jannik Sinner has moved into the quarterfinals at the Australian Open after beating Holger Rune during a match slowed down by medical timeouts for each player and a delay because the net got knocked loose.

Sinner's remarkable on-court ability to block out any distraction from his mission has been on full display as he seeks to defend his Melbourne title.

Ben Shelton has reached his first Australian Open semifinal by defeating Lorenzo Sonego 6-4, 7-5, 4-6, 7-6 in an entertaining match.

Swiatek will face No. 19 Madison Keys of the U.S. on Thursday night for a berth in the final. The other women’s semifinal is No. 1 Aryna Sabalenka, the two-time defending champion, against her good friend, No. 11 Paula Badosa.