Brooks Koepka carried a two-shot lead into the final 18 holes of the Masters after the third round was completed before lunch on Sunday in Augusta.
An early start, made necessary after torrential rain curtailed play on Saturday, meant there was plenty to play for before the players set out on their final circuit of the Georgia course.
Koepka fell back from an overnight 13 under par to 11 under, while nearest rival Jon Rahm reached the 54-hole mark on nine under, with both men signing for rounds of 73. Viktor Hovland was one shot further back in third place after a two-under 70.
The prospect of a LIV Golf player landing the Green Jacket therefore remained a strong possibility, with Koepka among the players widely characterised as rebels for defecting to the Saudi Arabia-backed tour.
LIV CEO Greg Norman spoke before the tournament of the prospect of players from the breakaway circuit mobbing the winner on the 18th green in the final round if he came from within their ranks, rather than from the PGA Tour or elsewhere.
Koepka was on the seventh hole in round three when play was suspended on Saturday afternoon, and at that stage he held a four-shot lead. That dominance was reined in when the action resumed.
Rahm closed to just one behind, 11 under to Koepka's 12 under, by the time the leaders reached the 13th tee, but a bogey six from the Spaniard there knocked him back one shot.
Hovland improved to eight under with five birdies in a row from the 11th, moving ahead of Patrick Cantlay who was early into the clubhouse on six under after a 68.
At 15, Koepka saw his ball roll back off the green and towards water, only to hold up on the damp grass.
That spot of good fortune would be followed by Koepka stretching his lead to three at the short 16th when Rahm sprayed his tee shot the wrong side of a greenside bunker. The world number three could not stop his chip close enough to the hole, missing the putt back.
Koepka's first three-putt of the tournament followed at the 17th, where a par from Rahm cut the deficit back to two, and both men parred the last to set up a titanic battle for glory in the afternoon, scrapping against each other with the backdrop of it being a LIV Golf versus PGA Tour head-to-head.
Twice a winner of the US PGA Championship, and twice a U.S. Open champion, Koepka was bidding to become the 20th golfer to reach five men's major triumphs.
Rahm is also a former U.S. Open winner, while Hovland has yet to win a major.
The final day's play from Augusta did not feature Tiger Woods, as the 15-time major winner and five-time Masters champion withdrew due to injury, having toiled his way to nine over, limping as he struggled in the rain on Saturday.