Troy Matteson remains on course for his third PGA Tour victory as he takes a three-shot lead into the final round of the John Deere Classic, while Australian John Senden remains in the hunt, five strokes adrift of the leader.
Matteson, though, has led after every round of the event at TPC Deere Run in Illinois, with a five-under-par 66 in the third round on Saturday taking him to 18-under overall.
The 32-year-old began strongly with three birdies and no bogeys for his first nine holes. He dropped shots at 11 and 18 on the way back in, but made up for it with four more birdies, including two in succession at 16 and 17.
Matteson is three strokes ahead of defending champion Steve Stricker, who matched Matteson's 66 to go outright second at 15 under.
Stricker must now make up the deficit on Matteson during Sunday's final round if he is to win what would be a remarkable fourth consecutive title at the competition.
Former US Masters champion Zach Johnson also made a move on day three, with a five-under 66 earning him a share of third, alongside fellow American Brian Harman at 14 under.
Senden, who claimed his only PGA Tour victory to date at the John Deere Classic in 2006, sits tied fifth at 13 under, alongside American Billy Hurley III, as the Australian followed up a seven-under second round with a four-under 67 on Saturday.
Senden appeared poised for a big push as he eagled the par-five second hole and produced another two birdies to turn for home at four under. But the Queenslander couldn't build on that, despite producing a bogey-free back nine.
Hurley, meanwhile, shot the joint-lowest round on Saturday, as a seven-under 64 saw him race 26 places up the leaderboard.
After Senden, Stuart Appleby is the best-placed Australian at 11-under overall, following a four-under 67 on Saturday that included six birdies but also two bogeys.
New Zealand's Danny Lee (72) and Australian Nathan Green (72) appear out of contention at five-under overall.