Lucas Herbert surrendered his outright lead of the Australian Open and will go into the final round tied with American Ryggs Johnston while South Korea’s Jiyai Shin took the outright lead in the Women’s Australian.

Lucas Herbert clung to a share of the lead at his home Australian Open on Saturday as American rookie Ryggs Johnston made a charge in a waterlogged third round and favourite Cameron Smith crashed out of contention.

Unheralded American Ryggs Johnston has joined home hope and halfway frontrunner Lucas Herbert in the Australian Open lead after a wet and wild third round.

Lucas Herbert again led the way after the second round of the Australian Open while 17-year-old South Korean amateur Hyojin Yang birdied her final hole to take the lead at the Women’s Australian Open being played concurrently at two courses on the famed Melbourne sand belt.

An unflappable Lucas Herbert led his home Australian Open at the halfway mark on Friday as fan favourite Cameron Smith tumbled down the leaderboard with a poor back nine at Kingston Heath.