Madison Keys is back into the Australian Open semifinals for a third time after her 3-6, 6-3, 6-4 win over Elina Svitolina of Ukraine.

Jannik Sinner is through to the Australian Open quarterfinals after a drama-filled fourth-round win over Holger Rune. World No. 1 Sinner won in four sets, 6-3. 3-6, 6-3, 6-2, but this did not tell the story of a contest defined by illness.

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

MELBOURNE, Australia — The screw holding the net in place at the Australian Open’s main stadium got jarred loose during defending champion Jannik Sinner’s fourth-round victory against Holger Rune, delaying play for about 20 minutes early in the fourth set.

Defending champion Jannik Sinner dismissed eighth seed Alex de Minaur 6-3 6-2 6-1 to reach the Australian Open semi-finals and extend the country's decades-long wait for another homegrown singles winner at the Grand Slam on Wednesday.

In the quarterfinals, Sinner will face No. 8 Alex de Minaur of Australia, who ousted American Alex Michelsen 6-0, 7-6 (5), 6-3. It will be the first quarterfinals appearance for de Minaur in his home country's Grand Slam, and he became just the third Aussie man to reach the round in 20 years.

Shelton also shouted out young Americans like Learner Tien, who upset No. 5 Daniil Medvedev and Alex Michelsen, who knocked out No. 11 Stefanos Tsitsipas and No. 19 Karen Khachanov before losing to de Minaur in the fourth round.

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.