World No.7 Alexander Zverev has shot down Nick Kyrgios’ prospects of securing a maiden grand slam title at the Australian Open.

Kyrgios will enter next week’s tournament as the nation’s top-ranked player in the men’s draw following Alex de Minaur’s injury-enforced withdrawal.

But Zverev, himself a grand slam under-achiever, think Kyrgios is still too inconsistent to challenge the heavyweights over five sets.

“There’s a lot of young guys that are right now, no offence, just better than him,” Zverev said when asked about Kyrgios’ chances at Melbourne Park.

“This is not a three-set match where you can win in an hour-and-20 (minutes) and get off the court.

“To beat the best, you have to play at your best for a longer period of time.”

Kyrgios and Zverev have built up a healthy rivalry as young stars on the rise.

The Australian world No.26 leads their head-to-head clashes 4-3 and won their most recent meeting, beating Zverev in the final in Acapulco last March.

During a press conference on Friday, Zverev also questioned why there was not more hype around the Australian No.1 rather than Kyrgios.

“Alex De Minaur is just simply more consistent right now as well,” Zverev said.

“I don’t know why not a lot of people talk about him because he’s been playing unbelievable at the ATP Cup.”

Kyrgios, who is seeded 23, will face Italian Lorenzo Sonego in his first-round match on Tuesday.