Smith had two birdies and three bogeys on his way to a one-over 73 in the third round on Saturday (Sunday AEST) to sit at six under and tied fourth behind American Kevin Chappell who leads at eight under.
However a disastrous back nine saw him slip out of contention - with a double bogey seven on the second seeing him move back to one under. He picked up the nearly obligatory birdie at the 17th but a bogey at the last saw him finish four shots from Chappell's lead although not without hope of contending for the title tomorrow.
Chappell struggled to a two-over start on the front nine, but he managed to salvage the round by birdieing three of four holes from No. 14 to No. 17.
Grace and Huh are each just one shot behind Chappell after posting rounds of 70 and 71, respectively.
Ryan Palmer, a West Texas native who cut through winds as strong as 25 miles per hour, had the round of the day with 4-under 68.
Franco and Singh finished at 15 under overall over the rain-shortened 36-hole tournament at the par-three Top of the Rock course, holding off a trio of teams that finished a stroke back.
Serena expecting baby this year
Meanwhile Petra Kvitova , a two-time Wimbledon champion will be eager to return from injuries sustained at her home in December. Other women have left the tour to have children and returned at a high level, though none has done so at Williams' age.
"I don't know what the weather has got in store for us tomorrow, but if it's a good day it's going to probably take a couple under (to win)", Grace said. "You can get it going on the finishing stretch". "I really took advantage of the finish there". "Obviously, the golf course hit me in the chin real hard early". He made me had to do it the right way.
Seamus Power and Graeme McDowell are both two over par after disapppointing rounds of 74 and 76 respectively. He stuck that to about three feet and made the birdie to go into the clubhouse tied with Chappell.
Chappell's birdie at 18 gave him the edge over Koepka, who played the course on fire with a 7-under 65, a score that matched the tournament low for the week. He also missed an eight-foot birdie putt on the drivable par-4 17th.
Kuboya started the final round six strokes off the lead but made up ground on Sunday with seven birdies in a bogey-free round at the Chiba Country Club in Noda, Japan.
Wiesberger's 71 featured par saves on the 12th and 17th and almost hit the pin with his approach to the last hole but was forced to settle for a par and a trip back up the 18th.
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