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Tsitsipas, Bautista Agut battle for semifinal spot

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Day 9 Australian Open preview: Tiafoe, Barty looking to continue dream runs

American Frances Tiafoe and local hope Ash Barty will be looking to continue their fairy-tale runs Tuesday at the Australian Open.

Australian Open: Day 9 Preview

Stephanie Brantz and Darren Cahill analyse some of the toughest matches ahead of Tuesday's matches, which include Petra Kvitova's showdown with home favourite Ashleigh Barty.

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DAY 9: QUARTERFINALS

Serena beats Halep

Chasing 24: Serena clears physical, mental hurdles in win over Halep

Cool and calm down the stretch, Serena Williams took out world No. 1 Simona Halep in the fourth round of the Australian Open.

Serena the favorite following Halep battle?

Nicolás Pereira and Stephanie Brantz discuss how far Serena Williams can go at the Australian Open following her three-set victory over World No.1 Simona Halep.

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Monday's highlights

Djokovic advances to Australian Open quarterfinals

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Serena takes down No. 1 Halep

Serena Williams defeats No. 1-ranked Simona Halep 6-1, 4-6, 6-4 to reach the quarterfinals at the Australian Open.

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Raonic moves on with upset win over Zverev

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Svitolina takes down Keys advances to quarterfinals

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Meet Danielle Collins

Surprised by Danielle Collins' run to the Aussie Open quarters? She isn't

Even if no one else saw her as a legitimate WTA star, Danielle Collins never stopped believing in herself.

Collins' strategy vs. Kerber: Go after it, believe in my shots

Danielle Collins says she believed in her shots during her win over Angelique Kerber and wants to keep winning Grand Slam matches.

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Tempers Flare at Open

Carreno Busta gets heated at chair umpire after loss

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Zverev smashes racket in frustration

0:27

Tsitsipas stuns Federer

Changing of the guard? What Tsitsipas' win over Federer really means

It was a shocker, to say the least. Stefanos Tsitsipas took down Roger Federer at the Australian Open, perhaps signaling the official start of the next generation.

Defending champ Federer loses to Tsitsipas

Two-time defending champion Roger Federer was upset by Greek youngster Stefanos Tsitsipas in the fourth round of the Australian Open on Sunday night.

Tsitsipas: 'I'm the happiest man on Earth right now'

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