Australian golfer Jason Day has insisted that dropping from the world number one ranking is not a "massive low".
For the first time in the sport's history, the number one ranking changed between three golfers - Spieth, Day and Rory McIlroy - for six consecutive weeks.
"Everyone thinks that [losing the ranking] is going to be a massive low," pga.com quotes Day as saying. "It's good to be number one, but it never changed me anyway - the way that I was as a person, the way that I worked.
"It's not a let down at all actually. It's more of a motivation to really understand what I need to do to get to that number one spot, how hard I need to work for next year to keep that.
"I want to be more of a dominant player and I want to be at the top of the world ranking list for a long, long time. I know how hard I had to work this year, so I got to work extra hard next year."
Day finished tied for 10th in Atlanta at the weekend.