Massimiliano Allegri hailed Paulo Dybala's "unplayable" display after the attacker scored a hat-trick to lead Juventus to a 3-1 victory over Sassuolo.

VIDEO: Mertens, Dybala hat-tricks light up Serie A

Juve has won its opening four Serie A games of the season, with Dybala scoring in each triumph and, in total, netting eight of his side's 13 goals.

After the Argentina international's latest match-winning contribution, Allegri lauded the development of his star man.

"He still has room for improvement, but at times he's just unplayable," the Juve manager said. "He's turning into an extraordinary player."

Comparatively, Dybala's strike partner Gonzalo Higuain has struggled in the early part of the season - but he retains Allegri's backing, despite his 78th-minute withdrawal.

"Higuain played well – he played for the team," he said. "He needs time to recover when we're playing every three days.

"I have some great players up front and substitutions will be vital. When you're at a big club, you have to use your quality to help the group get the win.

"The league will be a very long battle."

Victory was huge for Allegri and Juve, which had been comfortably beaten by Barcelona in the UEFA Champions League during the week.

Although his side collected the three points, Allegri identified the same flaws that had harmed its European performance.

"We played well in Barcelona but only for one half," he said. "We eased off on the pressure after that and lost our organisation.

"That's a flaw we showed [against Sassuolo] as well when we went 2-0 up – we gave them too many chances and that can't happen."