Day slips, McIlroy rises at Wells Fargo Championship

Australia's Jason Day has fallen away as Rory McIlroy mounts a challenge to leader Xander Schauffele at the PGA Tour's Wells Fargo Championship.

Schauffele, who entered the third round four shots clear from McIlroy and Day, had a 70 to get to 12-under 201 on Saturday as he looks to hold on and snap a 38-tournament victory drought.

World No.2 McIlroy posted a bogey-free four-under 67 to pull within a stroke of Schauffele going into the closing round.

"Two straight bogey-free rounds, this is what it must feel like to be Scottie Scheffler," McIlroy joked of the world's No.1 player and recent Masters champion, who is not playing this week.

But fellow former world No.1 Day struggled, making five bogeys in a 73 to drop to fifth, seven shots from the lead.

South Korea's Sungjae Im was third, four shots strokes behind Schauffele after a 69 with Austria's Sepp Straka a further shot back after matching McIlroy's low round of 67.

Day started the day with hopes to challenge for the lead, but was five over for the day through the first 13 holes before rallying with three birdies in the final five holes.

Fellow Australian Cam Davis was tied 13th at two under after a 72 while countryman Adam Scott posted a 73 to be tied 34th at two over.

Schauffele will have McIlroy playing alongside him in the final group on Sunday.

"I'm going to have to earn it tomorrow," Schauffele said. "I've got Rory breathing down my neck."

McIlroy averaged 338 yards off the tee on Saturday, outdriving Schauffele' by an average of 23 yards.

"The driving is more just me committing to most of the time hitting that little cut that I've been hitting off the tee, and then having the freedom to just, every time I hit a good tee shot, the more confidence I get and then the more I want to just keep hitting it," McIlroy said.

Straka has been a big surprise.

He's had an inconsistent season that includes four missed cuts and four top-25 finishes. But he's playing his best golf of the season following a fifth-place finish at the RBC Heritage Classic at Hilton Head, South Carolina.