Reaching No. 1 a big deal for Koepka

Brooks Koepka of the United States poses with his trophy after winning the CJ Cup PGA golf tournament at Nine Bridges on Jeju Island, South Korea, Sunday, Oct. 21, 2018. (Park Ji-ho/Yonhap via AP)

Reaching No. 1 in the world felt even sweeter to Brooks Koepka because of how he got there.

Golf is about winning, and the world ranking is merely a result of that. For all the math involved in a formula that tries to measure performance over two years, it's a lot easier to understand when the new No. 1 is posing with a trophy.

Dustin Johnson knows that feeling. So does Rory McIlroy.

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