Australia's golf stars face a gruelling game of catch-up after lightning, rain and more forecast foul weather turned the Masters into a physical and mental endurance test.
Jason Day was the only Australian to complete his second round before play was abandoned, leaving almost half the field needing to return on Saturday to take on a marathon schedule.
American Brooks Koepka was safely in the clubhouse at 12 under par and holding a three-shot buffer over his closest chaser, world No.3 Jon Rahm.
Rahm still has nine holes to play in his second round.
The Spanish star is among 39 players needing to complete day two's competition before the third round can start.
Day can sleep a little longer than compatriots Adam Scott, Cameron Smith, Min Woo Lee and Harrison Crowe, who are among those swept up in the backlog.
But that doesn't mean he will rest any easier, after the former world No.1 leaked four shots in his last four holes to drop from outright second spot into a share of sixth some seven strokes adrift of Koepka at five under.
"A kick in the gut," Day said after splashing his third shot in the water on the 15th en route to a double-bogey seven, then three-putting the 16th and 18th holes in a depressing finish.
"It's disappointing because you're coming in with some good momentum going into 15, even though I missed a short one on 14.
"It's disappointing to go from nine (under) back to five (under) in a matter of four holes.
"Who knows what happens over the next few days? I know where Brooks is but you never know how the weather pans out and then you could find something over the next couple of days.
"I'm thoroughly annoyed with myself ... I'm trying to get a hold of myself."
Adam Scott is hanging in there, one shot behind Day in a tie for 10th after negotiating his first 10 holes in even par for the day.
British Open champion Cameron Smith will resume on the ninth hole at two under.
But playing partners Min Woo Lee and amateur Harrison Crowe are fighting to make the projected halfway cut of three over.
Crowe is five over with three holes remaining in his second round, and Lee six over and needing a run of birdies.
