Rose focused on play not roller-coaster ride in world rankings

NASSAU, Bahamas – At some point, Justin Rose stopped breaking out the champagne.

On Sept. 9, Rose jumped from fourth to first in the Official World Golf Ranking. He again moved into the top spot on Nov. 4, following his victory at the Turkish Airlines Open on the European Tour, before being bounced to second the next week. On Nov. 18, he moved back into the top spot, before being unseated on Monday by Brooks Koepka.

There are a number of reasons for Rose’s wild world rankings ride, but essentially it’s come down to divisors.

“It was nice in Turkey to win a tournament to get to No. 1. That's always how I envisioned doing it,” Rose said on Tuesday at the Hero World Challenge. “The third time it…