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.

It's the second day of Australian Open quarter-finals with blockbusters galore spread throughout including reigning champion Jannik Sinner and local hope Alex de Minaur. The Australian will have to overcome a horrible win-loss record against the world no.

Zverev was already heated earlier in that game, when a spectator yelled “out” during a point. Zverev complained about it to Forcadell, who asked the crowd not to shout during points. After losing the next point, Zverev was warned about showing too much frustration.

Alexander Zverev was left bemused after the umpire stopped play in the middle of a rally when a bird's feather floated down on the court during his quarter-final against Tommy Paul at the Australian Open on Tuesday.

Alexander Zverev said Tuesday he believes he can reach the Australian Open final for the first time and is primed for a "very intense and high-level" clash to get there -- with Novak Djokovic or Carlos Alcaraz standing in his way.