The current No. 1 golfer in the world, Jordan Spieth, had an amazing year in 2015. So good, in fact, he said he's "not sure" he can top this success in 2016, per Steve DiMeglio of USA Today.
However, Spieth doesn't seem to lack confidence and said at some point he may find something he can improve on, per DiMeglio: "When I’ve done some thinking about it, which is not much as of now, that’s more of what December’s for, to re-evaluate and set new goals. But when I have done some thinking, in my mind I can certainly improve in spots of my game.