Bernhard Langer and Mark Wiebe posted matching pars on a pair of playoff holes at the Senior British Open on Sunday before play was suspended for darkness.
There were a couple of weather delays earlier in the day that lasted over two hours total, causing the playoff to be held in near darkness as the sun was setting.
The conclusion of the season's fourth major will start at 3:00 a.m. (ET) Monday.
Langer, who won this event in 2010, seemed in line for his 19th career Champions Tour title and third career major victory on the senior circuit when he made his way to the 18th hole with a 2-stroke lead, but posted a double bogey on the hole to fall into a tie with Wiebe at 9-under-par 271 and force the playoff.
Langer's gaffe resulted in him carding an even-par 70 during his final round at Royal Birkdale Golf Club, while Wiebe carded a 4-under 66 to meet Langer atop the leaderboard.
Corey Pavin fired the low round of the day with a 5-under 65 to jump into a share of third place with Peter Senior (66) and David Frost (70) at 6-under.
Peters Fowler (69) finished in sixth at 4-under and Sandy Lyle (70) captured seventh at 3-under 277.
Langer's troubles at the 72nd hole of the tournament began when his second shot found it's way into a greenside bunker.
He then failed to get out of the hazard with his first shot as it bounced back into the sand after hitting the top lip.
Langer was able to get his next shot safely onto the green for an opportunity for a clinching bogey, but he failed to convert his 7-foot attempt and he 2- putted for a double-bogey 6 to fall into the tie with Wiebe.
"I pulled the wrong club for the second shot and it ended up in the bunker close to the lip with the firm sand and I didn't get it out," Langer said. "I should have played short of the bunker, chipped it up and made an easy bogey."
They returned to the 18th for both playoff holes and on the first extra hole, Langer's second shot found the front of the green, while Wiebe's second settled just off the front fringe.
Both would roll their birdie putts to within five feet of the hole and convert their par efforts to force a second playoff.
After a brief conversation whether or not to continue in the growing darkness, they again returned to the 18th tee.
Wiebe followed his drive with a shot that rolled to just about the same spot as the first extra hole.
Langer again found the green with his second and they followed the same script as the first playoff hole with matching 2-putts.
They could not continue on to a third playoff, however, as there was not enough light left to continue.
"I was pleased with the two pars I made in the playoff and I still got another chance tomorrow," stated Langer.
Langer started his round with four straight pars before rolling in a birdie at the fifth to move to 10-under.
Wiebe then started to put a little pressure on the leader with an outward 31 that included birdies at the second, sixth, seventh and ninth around a bogey at the fourth to pull within two strokes of Langer.
But the German, who was playing in the final group behind Wiebe, stuck his second shot at the ninth to within 10 feet and converted his birdie effort to move to 11-under.
The duo again traded birdies at the 12th to maintain their 3-stroke differential moments before play was halted due to storms in the area.
When play resumed nearly an hour and a half later, Langer tripped to a bogey at the 14th to fall back to 11-under.
Langer followed with a par at the 15th, while Wiebe failed to convert a couple of birdie chances at the 15th and 16th to remain two strokes off the pace before play was again suspended due to inclement weather.
The second delay lasted about an hour and Wiebe parred his final two holes to remain two strokes behind Langer, who parred the 16th and 17th to hold a 2- stroke lead entering his disastrous 18th hole.
NOTES: Wiebe is seeking his fourth win on the Champions Tour and his first major victory ... If he goes on to win, Langer would join Gary Player, Bob Charles, Brian Barnes, Tom Watson and Loren Roberts as the only six multiple winners of this event ... Players in the last group have won four straight Champions Tour events, and nine of the last 14 overall.