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. Zverev was knocked off his stride in the second set by the lefthanded Frenchman,

Alexander Zverev has reached the Australian Open quarterfinals for the fourth time and will face Tommy Paul next.

Alexander Zverev is safely through to his fourth Australian Open quarter-final. The German faced Ugo Humbert in the fourth round at John Cain Arena and earned a 6-1, 2-6, 6-3, 6-2 victory in two hours and 16 minutes.

World number two Alex Zverev credited his brother Mischa for his mastery of left-handers after beating a 26th in succession in Frenchman Ugo Humbert to reach the Australian Open quarter-finals on Sunday.

Alexander Zverev's post-match interviewer at the Australian Open humbly apologised after the tennis star jokingly pointed out that she had a croaky voice during their post-match chat. Andrea Petkovic, the former German women's singles player, has spoken to dozens over players over the years after turning to media work following her retirement.

Alexander Zverev warned Sunday he can "do a lot of damage" at the Australian Open but is wary of "smart" quarter-final opponent Tommy Paul.