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.

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 booked an Australian Open quarter-final against Tommy Paul Sunday after surviving a mid-match wobble to oust France's Ugo Humbert as he zeroes in on a maiden Grand Slam title.

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

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.