He won by three strokes over his main competition for the season-long title, Chile's Joaquin Niemann (bogey-free 66 on Sunday), and fellow Spaniard Sergio Garcia (bogey-free 68).

"Today was a special day in many ways," Rahm said. "I woke up really nervous today, as I thought I would, and even warming up, I told Adam (Hayes, his caddie), man, I'm nervous. But then I started thinking, playing with Sergio and Brooks (Koepka), last time both me and Sergio played good, it was a good Sunday in Valderrama; Sergio ended up winning. Last time I went up against Brooks, he ended up beating me. I wanted to, hopefully, do a really good showing this time and maybe get it over the line."