Shane Lowry is seven shots behind leader Dustin Johnson heading into Sunday's final round at the Saudi International.
The Offaly man carded a third round 67 on Saturday to match his Friday score as he moved into a tie for 23rd on six under.
Lowry carded five birdies, with the only blemishes being bogeys on holes four and seven.
He is one shot ahead of Co Down's Cormac Sharvin whose 66 puts him on five under. Graeme McDowell slipped down the leaderboard and is in a tie for 73rd on three over par.
But it's 2020 Masters champion Johnson who leads the way on 13 under after carding a 66 as he bids to win the Saudi International for the second time in three years.
The two-time major winner is two shots clear of Victor Perez, while Tyrrell Hatton and Tony Finau are among a four-way tie for third on 10 under.
Four birdies in the first 10 holes saw the two-time major winner cruise into a two-shot lead and his only blemish of the week so far came when he found the water with his approach to the 13th to run up a double-bogey six.
"Felt like I played really well all day, other than 13, but I didn't think I hit that bad a shot," said Johnson, who birdied the 17th and 18th to give him a stroke average of 66.18 from his 11 rounds at Royal Greens Golf and Country Club.
"I pushed it a hair right of the flag but just came up well short of where I thought it would and ended up making six there.
"But other than that, I drove it well and hit a lot of really good iron shots in there to give myself a lot of good chances at birdie. Didn't hole a whole lot of putts, but finishing nicely definitely helped the day out.
"I like the golf course. I think it sets up good for me. I've liked it since the first time I came here a couple of years ago. I feel like I'm swinging it well and giving myself all the chances tomorrow. Just need to hole a few putts."
Perez carded four birdies in a bogey-free 66 and is relishing playing alongside Johnson in the final round as he looks to boost his chances of qualifying for a Ryder Cup debut in September.
"I think that's as good as it gets and I'll be very excited for the challenge," Perez said. "I think this is all you strive for.
"I think the Tour is doing great at having some of those great players being here and playing and giving us the chance, mostly staying in Europe the last two years, of playing against those guys. It will be a great competition."
Sergio Garcia's 64 was the lowest round of the day and lifted the Spaniard into a seven-strong group on nine under par which also contains Viktor Hovland and Scotland's Calum Hill.