Mills played a vital role in the Spurs' 111-92 road victory in Game 3 of the NBA Finals series on Wednesday (Australian time), with the 25-year-old contributing five points, two rebounds and four assists from 15 minutes of court time.
But it was his efforts at the defensive end of the court that once again won most of the plaudits, as he drew an important offensive foul on Mario Chalmers during the third quarter and won a crucial loose ball shortly after.
It is this type of effort that Spurs fans have come to expect from Mills and that veteran coach Gregg Popovich demands from every player on his deep roster.
The Spurs have nine international players in their ranks and Mills said every one of them is proudly representing their country during the NBA Finals series.
"All the guys on the team from different countries are representing and flying the flag very high and proud," Mills said after the win.
"And that is what I am doing.
"Using the big stage to fly the flag and let everyone know that I am representing Australia just as much as the Spurs and my family."
Mills said the level of support he had received from his country during the NBA Finals had blown him away.
"Everyone back home in Australia is on board and it is great to see," he said.
"It has been great to see the support and I get a kick out of seeing everyone back home waving the flag as well."
Team-mate Kawhi Leonard won rave reviews for his Game 3 performance as he poured in a career high 29 points on 10-of-13 shooting from the field.
Mills was impressed with Leonard's efforts, but issued a challenge to the 22-year-old to produce it again during the remainder of the series.
"The challenge for him (Leonard) and for all of us is to maintain that energy and effort and be consistent for the rest of the series," Mills said.
"He is a very important guy for this team and when he performs well we tend to feed off that energy.
"He learnt from the first two games on what he needed to do better and he came out here and showed it tonight."
Game 4 of the series is in Miami on Friday (Australian time), before the teams return to San Antonio for Game 5 on Monday.