BELEK, TURKEY (Reuters) - Rory McIlroy capped the best season of his career by adding the European Tour's money-list title - the Race to Dubai - on Sunday to his two major championship victories.

The 25-year-old world No. 1, who sat out this week's US$7 million (S$9 million) Turkish Airlines Open in Belek, knew the crown would be his, providing Sergio Garcia of Spain, German Marcel Siem and Jamie Donaldson of Wales failed to win.

"To win the Race to Dubai for the second time really is something truly special," McIlroy said in a news release, after victory in Turkey went to American Brooks Koepka. "That four-week spell over the summer, from the Open to the PGA Championship, would have to be the best golf of my life so I feel like I've really earned the Race to Dubai.

"Winning it for the first time two years ago was a fantastic feeling but I feel like I'm now a more complete player and my all-round game has moved to another level. I've put in a lot of hard work this season, with my game and my fitness, so it's nice to get the rewards at the end of it."

McIlroy, who also won the Tour's flagship event - the BMW PGA Championship at Wentworth - and the WGC-Bridgestone Invitational in Ohio this year, said he would still go all out to capture this week's DP World Tour Championship title in Dubai.

European Tour chief executive George O'Grady saluted McIlroy's 2014 achievements. "It says something about his outstanding form that Rory ends the year as the dominant player not only on our tour but on the world stage," he said. "He is a credit to himself and to the European Tour and a most deserving winner of the Race to Dubai."