(Reuters) - World number one Jordan Spieth carded a second round nine-under-par 64 to vault into a four-stroke lead at the Hyundai Tournament of Champions in Hawaii on Friday.
Spieth had a 35-foot chip-in for eagle at the par-five ninth and added seven birdies on another benign day at the Kapalua Plantation course on Maui.
His 16-under halfway total of 130 is four better than first round leader Patrick Reed (69), Kevin Kisner (65) and Fabian Gomez (66), and the 22-year-old is on track to break the tournament record of 31-under set by Ernie Els in 2003.
Should he lift the trophy on Sunday it would be Spieth's seventh victory on the PGA Tour, matching the number achieved by Tiger Woods before turning 23.
Posting his second straight bogey-free round, Spieth plundered the par-fives, playing them in a total of five-under, and on the few occasions he was in danger of dropping a shot his flawless putting came to the rescue.
Spieth finished his round in style, coaxing in a 13-foot birdie at the par-five 18th where his ball teetered on the edge of the cup before dropping in.
(Reporting by Andrew Both in Cary, North Carolina; Editing by Peter Rutherford)