The big names have failed to fire in the third round of the World Super 6 Perth golf tournament, with Thailand's Prom Meesawat pushing to the top of the leaderboard.
Seven players held the lead during Saturday's play but Meesawat's five birdies on the back nine had him standing alone at the end of the round. The burly Thai golfer, along with seven others in the top eight, will go into the second round of the knockout matchplay on Sunday.
The unique tri-sanctioned European Tour tournament sees the top 24 after the first three rounds of strokeplay undertake matchplay on the final day to decide the victor, with the top eight qualifiers having a bye in the first round on Sunday.
Overnight leaders Brett Rumford, the defending champion, and Lee Westwood endured miserable days at Lake Karrinyup Country Club, with each carding a six-over-par 78 to miss out on the final day's play.
Sean Crocker, Lucas Herbert and Olesen finished in a tie for second at 10-under and each collected $8333.
Former world No.1 Westwood produced just one birdie for the round, on the 17th hole.
The low point of Westwood's round came at the sixth hole when he duffed a chip shot en route to a double bogey.
"Not a lot went my way", Westwood said.
Kenya, Ethiopia thwart Nigeria hopes for Lagos marathon
In his address at the marathon, host governor Akinwumi Ambode pledged to train Nigerian athletes to ensure a home victory in two years.
"I hit a few bad shots, got a few bad breaks and didn't make any putts. Made one birdie on the 17th, so you're not going to score well doing that".
He looked well placed to reach the final 24 until a disastrous double bogey on the 16th killed off his chances.
"I've been playing pretty good for a while now", Horsfield said.
"I'm just going to go out and have fun, concentrate with my game".
That involves a series of six-hole matches at Lake Karrinyup, with 24-year-old Craigielaw man Forrest taking on Australian Matthew Millar in the opening round and Sam Horsfield awaiting the victor after the Englishman was among the eight players to receive byes.
Although he said he believed his last experience of matchplay was at least a decade ago, the 33-year-old was excited by the opportunity to participate in the final day.
"If I can win the tournament tomorrow, it's going to be very nice as it'll be my first European Tour win".