KUALA LUMPUR - Justin Thomas secured a back-to-back CIMB Classic title Sunday, posting a flawless eight-under 64 to erase a four-stroke overnight deficit in the only PGA tour event he has ever won. Thomas finished at 23-under overall at TPC Kuala Lumpur, three shots ahead of Japan's Hideki Matsuyama, whose final-round 66 was not enough to keep up. Both of the 23-year-old Thomas's two PGA Tour wins have been at the CIMB Classic. Thomas also put in a solid showing at last week's Safeway Open, the PGA Tour's season-opener, finishing just four strokes off the lead. "I feel like I just need to continue to build on this momentum and try to use this as kind of a springboard to the start of the year," he said. "To try to move up in the world rankings and get in that top ten, get in that top five."