Dustin Johnson says his victory at the US Open last year was the ignition for his dominant reign in 2017.

The world-number-one earned his maiden major title with a three-shot victory at Oakmont Country Club and admits much of his success since has sprung from that.

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“Winning the US Open gave me a lot of confidence,” Johnson said in his press conference prior to the Memorial Tournament this week.

“We have just worked hard on the game ever since then and felt like it’s been pretty solid ever since the US Open last year,” he added.

With seven consecutive top 15s that includes five tops fives and three (consecutive) wins, the Columbia-born star is well aware of the importance of his consistent form in the run-up to last year’s US Open.

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“Last year after leaving here I had played very well in pretty much every event I had played in all year and I just hadn’t won.

“I went to Memphis [at the FedEx St. Jude Classic] the next week and finished fifth and then obviously won the US Open the week after that,” Johnson continued.

“But I was playing really solid really consistently leading into the US Open and for me it was just a matter of time before I put it all together.”

If form is something that Johnson relies heavily on, he can take a lot of confidence to Erin Hills in two weeks time as he defends his US Open title.