Major winners Cameron Smith and Jason Day went stroke-for-stroke for a share of the early clubhouse lead on four-under-par after matching 67s in the opening round of Australian PGA Championship on Thursday.

Smith and Day played with defending champion Min Woo Lee in an Australian super grouping as they made an early start in cloudy conditions at the Royal Queensland Golf Club in Brisbane.

Lee had the best of the early play with four birdies in his first six holes but former world number one Day, playing on home soil for the first time in seven years, was soon hot on his heels as they approached the turn.