Patty Mills and Aron Baynes could join Australian basketball greats Luc Longley and Andrew Gaze with NBA Championship rings.

The evolution of Patty Mills from a towel-waving benchwarmer to a key cog in the San Antonio Spurs machine was clear in two key plays in their latest NBA Finals win.

The plays weren’t among his four successful three-pointers.

They came when the 183cm tall, 84kg point guard from Canberra found himself at the top of the key defending one-on-one the world’s best basketballer, the Miami Heat’s LeBron James.

It was a mismatch on any terms.

The 203cm, 113kg four-time NBA MVP James usually devours such opportunities, but in Thursday’s crucial game four of the NBA Finals, with James desperate to get his team a home court win and level the series, it was Mills who won both duels.

“I didn’t really see a mismatch in my eyes,” Mills said after the Spurs’ 107-86 win, giving his team a 3-1 lead and putting them just one win away from the NBA Championship.

“When you come up against someone like that, that’s the mindset you have to have.”

After the win, Mills’s team-mates showered him with praise.

He is known as an offensive threat, but Spurs veteran Manu Ginobili affectionately described Mills as a defensive “pest”.

When Mills heard Ginobili’s description he offered a smile: “On the court or off the court?

“I think I am a pest off the court as well with the amount of questions I have for him (Ginobili).

“I think that’s a good word to describe my job because that’s what I have to do.”

If the Spurs defeat the Heat on Sunday (Monday AEST), Mills and his Queensland team-mate Aron Baynes will join Luc Longley and Andrew Gaze as Aussie NBA Championship ring winners.

Spurs head coach Gregg Popovich says without Mills he would not have been able to rest his starting point guard Tony Parker during the marathon regular season and playoffs.

Parker has battled leg injuries after playing four years without a break, his summers devoted to duties with the French national team in European, Olympic or world tournaments.

At the start of the season Popovich needed a reliable back-up point guard and it came down to Mills or Canadian-born Cory Joseph.

“When Patty came to camp this year all trim, very aggressive, very focused he made us notice him and that he wanted to be part of this and didn’t want to be on the bench,” Popovich said.

Popovich found himself leaving Mills on the court and Parker on the bench.

“Tony is champing at the bit to get back on the court and I have to settle him down and say, ‘Do you see how this guy is playing out here? We may as well keep going with him’,” Popovich said.

Parker won’t play for France at the World Cup in Spain in August-September, but Mills will lead the Boomers.

“I wish luck for Patty this summer because I’ll be on vacation all summer,” Parker said.

“I’ll be laughing at Patty next year.”