Alex de Minaur overcame a one-set deficit and his own serving yips Saturday afternoon to defeat 31st-seed Francisco Cerundolo in a marathon third-round Australian Open match.

Alex de Minaur has explained why he slapped his legs during the fourth and final set of his match against Francisco Cerundolo. The No. 8 seed stormed back from a break down to advance to the second week of the Australian Open with a 5-7 7-6(3) 6-3 6-3 victory.

It was the opening round of the 2017 Australian Open in de Minaur’s first main draw at his first major championship in his home country, when the then-17-year-old saved a match point in the fourth set before beating Gerald Melzer in five sets and almost four hours.