Former World No.1 Day debuted accomplished caddie Williams on his bag at last week's US Open, but was unable to threaten the leaderboard at Pebble Beach and struggled to a tie for 21st.

It meant Day was unable to tap in to Williams' uncanny ability to keep golfers composed in the thick of major contention.

The 55-year-old New Zealander developed the skill while he helped Tiger Woods to 13 major victories and Adam Scott during his 2013 Masters win at Augusta National.

But with the Travelers Championship in Connecticut serving as Day's second-last event before the Open in Northern Ireland, the Queenslander wants to test the fledgling relationship under pressure.

"I think (the partnership) only gets better as you get yourself in contention and around the lead at tournaments," Day said.

"Steve has a way of calming you down. I'm hoping to get myself in contention and see what it's like with him standing next to you.

"He reinforces your good shots, and even on missed putts he reminds you that it was a good putt and to stay patient.

"I could feel that within four days at Pebble Beach. So it's up to me to try to listen, stay disciplined and hit it where he wants me to."

RIGHT: Day is looking forward to playing the more forgiving TPC River Highlands this week. PHOTO: Andrew Redington/Getty Images.

After the Travelers at TPC River Highlands, Day will contest the inaugural 3M Open in Minnesota as his last event before the Open at Royal Portrush.

Day said he was looking forward to the more forgiving TPC River Highlands.

At 6,841 yards, it is in the top two shortest courses on the PGA Tour.

"The last three tournaments I've played have been such tough tests, (the US PGA Championship at) Bethpage, (Memorial Tournament at) Muirfield Village and a US Open.

"Overall I'm looking forward to the golf course and the event. It's a shorter course, so if you're driving it well you're going to give yourself a lot of opportunities."

Joining Day in the Travelers field are fellow Australians Marc Leishman, Matt Jones, Rod Pampling, Curtis Luck, Cameron Smith, Aaron Baddeley and Cameron Davis.

Headlining the Travelers are major champions Bubba Watson, Brooks Koepka, Francesco Molinari and Justin Thomas, as well as recent PGA Tour winners Bryson DeChambeau and Paul Casey.

- Evin Priest, Australian Associated Press