Jon Rahm is preparing himself for a stern test when the US Open tees off at Erin Hills on Thursday.
The Spaniard was the low amatuer at last year's event – finishing T23 – and is hoping to build on his solid performance around a tricky Oakmont course in 2016.
However, the links nature of Erin Hills is a concern for the world number ten.
"It's like a links golf course on steroids…everything is a little bigger," the 22-year-old admitted in a pre-tournament press conference.
"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."
Part of the test around Erin Hills is the knee-high fescue that sits just feet away from some fairways. Rahm admitted he did not play out of the fescue for fear of injury.
"I didn't step in it, there's no need to injure my wrist this week before I tee off," he added.
"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."