Alexander Zverev continued his bid for an elusive first Grand Slam title with victory over Tommy Paul to reach the Australian Open semi-finals.

The German second seed won 7-6 (7-1) 7-6 (7-0) 2-6 6-1 against the American 12th seed on Rod Laver Arena.

The victory was 27-year-old Zverev's seventh in a row and continues his unbeaten start to his season.

"I should have been down two sets, he played better than me and I was not playing great," Zverev said.

"The fourth set was definitely the best I played and I'm happy to be back in the semi-finals."

Zverev previously reached the semi-finals at Melbourne Park in 2020 and 2024.

He will play either 10-time champion Novak Djokovic or Carlos Alcaraz - who beat Zverev in the French Open final last year - in this year's last four.

The match will be Zverev's ninth Grand Slam semi-final - the most among active players who have not won a major.