One of the US Open favourites Jon Rahm brands venue Erin Hills as like a 'links course on steroids'

Click here for David John's expert betting preview and selections

Although they always deny it, the United States Golf Association (USGA) want the US Open to be the toughest test for the world's best players, with the winning score close to level par.

That usually means narrow fairways, thick rough and quick greens and Erin Hills in Wisconsin looks to be no exception, with scare stories abounding about the knee-high fescue grass which lurks just a few feet off the fairways.

Spain's Jon Rahm, who is one of the favourites for victory in just the fourth major championship of his career, said: "I didn't step in it. There's no need to injure my wrist this week before I tee off.

"It really looks very penalising. Unless you get extremely lucky where you might be able to move it 120 yards, it looks like a 30-yard chip out to the fairway.

"I think we've all seen the videos on social media that Kevin Na and Rickie Fowler and other players posted. It doesn't look easy to move out of there. It wouldn't surprise me if someone loses a ball and has to take an unplayable (lie)."

At 7,741 yards, Erin Hills is the longest course in major history and the par-five 18th can stretch to 675 yards, although numerous tee boxes allow the course set-up to be varied every day depending on weather conditions.

"It's like a links golf course on steroids," added Rahm, who was the low amateur in a tie for 23rd at Oakmont last year. "Everything is a little bigger.

"It's a US Open, they expect our best. It's big greens, big slopes, you have to be able to lag putt. With all the slopes going off the green, you might miss the green by three feet, roll off to 30 feet and being able to putt those, or even if you want to bump, run, chip it close, it's going to be important.

"We saw that at Pinehurst (in 2014). It worked out pretty well that week."

Rahm has enjoyed a spectacular rise through the ranks since turning professional after last year's US Open, winning his maiden PGA Tour title in January and finishing third and second in his first two World Golf Championship events.

The 22-year-old has climbed from 551st in the world rankings to his current position of 10th and now has his sights set on following in the footsteps of Masters champion Sergio Garcia.

"It just motivates me," Rahm said of his fellow Spaniard's overdue triumph at Augusta. "We've played together a bunch this year. I've played against him in the (WGC) Match Play.

"I've seen him play and I see what he can do and I know what I'm capable of. It makes me believe that I'll be able to win a major some day.

"And it makes me want to work harder. A close friend of mine winning a tournament motivates me. A Spaniard winning a major is always going to motivate me."