Rory McIlroy admits a third consecutive Race to Dubai title is now out of his hands after his withdrawal from the Turkish Airlines Open.
McIlroy did not give a reason when informing Tour officials of his decision on Saturday, but it is understood the world number two has security concerns surrounding the first of the three Final Series events.
An explosion outside the Antalya Trade and Industry Chamber injured around a dozen people on Tuesday. The £5.7m Turkish Open is at Regnum Carya Golf & Spa Resort in Antalya.
McIlroy finished joint fourth in the WGC-HSBC Champions on Sunday, but is well behind new Race to Dubai leader Henrik Stenson and second-placed Danny Willett.
"I guess it's out of my hands," McIlroy said. "I took the decision not to go to Turkey next week and those boys can battle it out.
"If I have somewhat of a chance going into Dubai that's great. But if not, I think over the course of the season they have had big wins and played well.
"They are two major champions, so I'm okay with that."