De Minaur,who speaks fluent English and Spanish as well as some French,said he was grateful to live under the guidance of Hewitt,alongside his wife Bec and children Cruz,Mia and Ava.
"It was great to just have that inside advice all the time and get his thoughts on everything,"De Minaur told Fairfax Media.
"It was a great preparation for the Australian Open. A very tough pre-season and I couldn't be happier. I stayed with him in Sydney and also at his place in Melbourne. At the French Open last year in the juniors,he came out and we had a nice chat and told me that he would be very supportive of everything I needed.
"It's been unbelievable the amount of stuff he's done for me. I couldn't be more grateful. I spent time with his family and we went out with the family for dinner together ... it was nice."