Tony Finau: Brooks Koepka is the guy to beat at the U.S. Open

Since 2017, Brooks Koepka has won two U.S. Opens, two PGA Championships and finished second to Tiger Woods at the Masters. He's on a scalding hot streak right now, and that fact certainly isn't lost on his fellow golfers.

Going into the 119th U.S. Open this week at Pebble Beach, Tony Finau, who finished fifth in last year's tournament, singled Koepka out as the one to beat.

"Until he proves that he's going to cool down, you've got to think that he's going to be your biggest competition," Finau told AOL.com on behalf of American Express.

"If you beat [Koepka], you probably could be crowned champion."

A U.S. Open three-peat has only been completed once before, by Willie Anderson in 1903-05.

Pebble Beach provides a unique challenge for golfers, according to Finau. The course features greens that are smaller than what players are used to on the PGA Tour, requiring pinpoint accuracy from the tee box through the fairways.

Koepka is among the favorites heading into the U.S. Open – and "rightfully so," says Finau – but Pebble Beach has been home to multiple miracles previously, so anything truly is possible.