Jason Day will lift the Claret Jug if he can repeat his super third-round performance at the Old Course.

That is the view of Team Day, as the Aussie world No. 9 chases his first major championship.

After eight top-10 finishes in 19 major tournaments, Day has long been considered a major champion in waiting.

A bogey free six-under-par 66 on Sunday puts him in the lead heading into the final round for the second straight major and it will take a similar composed effort to finally break his duck and become the country’s first British Open winner since Greg Norman in 1993.

Day leads the US PGA Tour with a birdie every 4.6 holes this season and has no problem making runs up leaderboards.

It is the mistakes that have tripped him up.

Last month he had five bogeys and a double bogey on Sunday when playing in the final group at the US Open, way too many to cut the mustard. Mistakes also tripped up tilts at the Masters and US Open of 2013.

At the Old Course he so far has just three bogeys, two of which came in farcical conditions during a controversial 32 minutes of play in round two.

“If I could take a round that I need to play tomorrow it is today’s round,” Day told AAP.

“The way I felt and the way I looked and the way I played that’s what I need to do.

“If I can do that, limit my mistakes, then I know I will be there with a chance to win and that is what I am here to do.”

The 27-year-old’s coach, caddie and long time father-figure Colin Swatton echoed the sentiment and was as proud as punch with their move to the lead.

“He wants more of the same.

“Today he was very composed, made a lot of good choices and a lot of good decisions and that was the difference.

“He was much much slower in how he did things,” Swatton told AAP.

“The key is we just have to continue to go through our process and what we have to do and just make really good choices.

“I will mention to him how composed he was, how particular he was in gathering information and making the right choice.

“Sometimes the moment can just get a little too much for you but he was really good at that today. I think he can draw on the disappointments of not being able to do it before.

“He’ll take that and say `it’s my chance and I have to take it’, which I hope he does.”