Alexander Zverev takes his chances to knock Tommy Paul out of Australian Open

Alexander Zverev hits a forehand (Vincent Thian/AP)

Alexander Zverev reached his third Australian Open semi-final with a four-set win over American Tommy Paul.

The second seed, who is bidding for a first grand slam title, had lost both his previous two meetings against Paul but proved the stronger in the big moments to win 7-6 (1) 7-6 (0) 2-6 6-1.