He rounded off an unbelievable year by being a key member of the Presidents Cup team that won a nail-biter in Incheon 15.5-14.5 on the final green. He was dominating golf, but level-headed and mature enough to expect such heady times couldn't last. "There's really nothing I could do that wouldn't be a dip after 2015," Spieth told AFP in a frank interview at the CJ Cup in South Korea, where on Thursday he will tee up in Asia for the first time since 2016.