American Jason Dufner completed a round of seven-under-par 64 to seize a share of the lead after the first round of the PGA Tour’s Phoenix Open on Friday.

Dufner is the co-leader of the $6.1 million event with Ryan Palmer, who barely got his 18 holes in on Thursday before darkness halted first-round play.

Dufner made birdies on two of his first five holes on Friday morning at the TPC Scottsdale. He finished second here last year, losing in a play-off to fellow American Mark Wilson.

Bo Van Pelt, Spencer Levin and Webb Simpson were one stroke behind the leaders at 65 as 42 golfers completed their rounds on Friday morning.

Jarrod Lyle was the best of the Australians with a 66.

For the second consecutive day, the start of play was delayed an hour because of frost.

Last year, frost and freezing overnight temperatures delayed play nine hours during the week, leading to a Monday play-off finish.