Berrettini overcomes teenager Alcaraz

Seventh seed Matteo Berrettini overcame Spanish prospect Carlos Alcaraz in an enthralling five-set battle to reach the Australian Open fourth round.

Italian Berrettini established a two-set lead before 18-year-old Alcaraz, the youngest man in the draw, fought back to take it to a thrilling fifth.

"He is unbelievable," said 25-year-old Berrettini of his teenage opponent.

Berrettini's next opponent is Spanish 19th seed Pablo Carreno Busta, who defeated another rising star, American Sebastian Korda, 6-4 7-5 6-7 (6-8) 6-3.

Alcaraz, who beat Berrettini at the Erste Bank Open in Austria last year, saved the point with a fizzing second serve and battled back to hold and force the tie-break.

Zverev will now play Canadian 14th seed Denis Shapovalov, who beat American Reilly Opelka 7-6 (7-4) 4-6 6-3 6-4.

French 17th seed Gael Monfils overcame Chile's 16th seed Cristian Garin 7-6 (7-4) 6-1 6-3 and will play Serb Miomir Kecmanovic, who knocked out Italian 25th seed Lorenzo Sonego 6-4 6-7 (8-10) 6-2 7-5.