Dustin Johnson wins Tournament of Champions in Hawaii by eight shots

Johnson made a fast start to 2017 too, winning three events in a row before injuring himself just before the Masters

World number one Dustin Johnson surged to an eight-shot victory at the Tournament of Champions in Hawaii.

The American, 33, who led after three rounds, fired an eight-under 65 to cruise to the title, with Spain's Jon Rahm a distant second after a 69.

Johnson followed rounds of 69, 68 and 66 by making four birdies on the front nine then eagled the par-four 12th.

American Brian Harman finished third on 15 under while Open champion Jordan Spieth was a further three shots back.

Australian Marc Leishman, who was the joint leader at the halfway stage but carded a 76 on Saturday, finished tied seventh on 13 under in the 34-man field.