Brendon Todd and Vaughn Taylor are tied for the lead with four holes to finish in the PGA Tour's rain-delayed Mayakoba Golf Classic in Mexico.
Play was suspended on Sunday because of darkness with the resumption due Monday morning.
Todd and Taylor are at 20-under with Harris English and Carlos Ortiz joint third a shot off the pace and Adam Long solo fifth at 18 under.
Ortiz is challenging for his first PGA Tour victory before a home crowd in Mexico.
He was one shot behind and chose not to play the 18th hole when it became too dark for him to see properly.
RIGHT: Taylor is tied for the lead with Todd with four holes to play. PHOTO: Cliff Hawkins/Getty Images.
Todd had a two-shot lead until he failed to get up-and-down from just off the green on the par-5 13th, and then hit a heavy chip and missed a seven-foot par putt on the next hole.
Coming off a Tour victory in Bermuda two weeks ago, Todd shot a six-under 65 on Sunday morning to be 16-under and take a one-shot lead into the closing round.
Taylor (66) and English (68) were next best at 15-under.
The tournament did not start until Friday because heavy rain washed out the day's play on Thursday.