De Minaur, who got the better of Novak Djokovic, Alexander Zverev, and Taylor Fritz at the United Cup team event, beat Arnaldi 6-3, 6-0, 6-3 to move into the third round for a fourth straight year.

While the Australian No 1 eventually claimed a comfortable win today, he was made to work in the first set by Arnaldi and twice had to save break points to preserve his early lead.

The 24-year-old also let his concentration slip briefly towards the end of the match and was broken by Arnaldi while leading 3-1 in the third set, though he recovered well to seal the victory.

“I feel in a good position where maybe I know if I don’t bring my A game, I’ve still got plenty to show. I’ve won enough matches this year to kind of know how to win certain types of matches…,” De Minaur told reporters.

“I think so far I have done what I needed to do to win the matches. It hasn’t been probably the prettiest of levels or my best level.”

“I played two opponents where maybe I haven’t been allowed to be as aggressive as I would like, because, you know, they’ve got a lot of firepower. But I do think I’ve got a lot more to show.”

De Minaur next faces Italian qualifier Flavio Cobolli.