KUALA LUMPUR (Reuters) - Justin Thomas fired a final round eight-under 64 to overturn a four-shot deficit at the start of the day and retain his CIMB Classic title in Malaysia on Sunday.

The 23-year-old American capitalised on overnight leader Anirban Lahiri's quadruple bogey nine on the par-five third hole to retake a lead he had held over the first two days. He then eased clear to win by three shots with a 23-under total.

Lahiri was searching for a maiden PGA Tour win at the TPC Kuala Lumpur course but the five-shot swing after he lodged his tee shot in a tree left the Indian with too much to do and he had to settle for a tie for third, four strokes back.

Japan's Hideki Matsuyama birdied the last two holes to sign for a 66 and claim second place on 20-under, with Lahiri (72) and American first round co-leader Derek Fathauer (67) rounding out the top four a further shot adrift.

The US$7 million (S$9.76 million) limited field event, the second on the 2017 PGA Tour calendar, is co-sanctioned by the Asian Tour.