Despite notching an incredible PGA record low 34-under on a 72-hole par, the Tournament of Champions still wasn't decided until Cameron Smith’s final hole Sunday.

But a birdie on 18 wrapped up Smith’s one-stroke victory and a final-round 65 (eight-under) for the Australian in Kapalua, Hawaii.

"Unreal round," Smith said. "Something I’ll never forget."

Smith hit eight birdies on the day, including four over the final six holes, to keep his competition at bay.

Ireland's Seamus Power signed for a final a round of 67 with six birdies and no bogeys, leaving him on 20 under par for the tournament and taking a share of 15th place.

The win was Smith’s fourth on the Tour. His most recent victory prior to Sunday was at the Zurich Classic of New Orleans - coincidentally where he also earned his first championship - last spring.

World number 1 Jon Rahm of Spain and Australia’s Matt Jones, who had to settle for second and third respectively, each bested Ernie Els’ previous high-water mark of a 31-under, set at the 2003 TOC. Rahm finished 33-under, while Jones was 32-under.

FINAL LEADERBOARD

Rahm, who finished with a seven-under 66 on Sunday, birdied his final hole to keep the pressure on Smith, before Smith matched his round.

Rahm scored 32 birdies over four rounds, tying another PGA Tour record. He tied Mark Calcavecchia (2001 Phoenix Open) and Paul Gow (2001 BC Open).

"I have every reason to be smiling," Rahm said. "It’s a bittersweet moment."