James Magnussen rebounded from another sleep-deprived night - this time for welcome reasons - to fight his way into the 50m freestyle semi-finals at the world championships.
The 100m world champion clocked the 11th-fastest time of 22.04 seconds in Friday's heats of the one-lap splash and dash, while fellow Australian Matt Abood (21.84) was the fourth-quickest qualifier.
Magnussen has endured plenty of mid-meet anxiety in recent years but this time it was feelings of relief that kept him up after claiming a second straight 100m world title on Thursday night.
"I didn't get very much sleep last night so I just had to get through this morning," Magnussen said.
"Hopefully I can get some rest and I'm going to have to really be on my game to get through to the final.
"I feel like if I can get to that final anything can happen. My biggest hurdle is probably getting there."
Abood was pleased with producing his best 50m swim in a textile suit.
"It's nice to be back at this level of competition and I'm enjoying it," said Abood, who missed London Olympic selection.
Olympic champion Florent Manaudou (21.72) of France was fastest qualifier ahead of Brazilian world record holder Cesar Cielo (21.76).
A gruelling schedule finally took its toll on Alicia Coutts, who missed the 50m butterfly semis.
Coutts (26.56), in her 10th swim of the meet, was 18th fastest but Brittany Elmslie (26.03) went through.
"I just didn't feel that good this morning, didn't feel fast," said Coutts, who already four silver medals from the meet.
Australia surprisingly missed the men's 4x200m freestyle final.
A team of David McKeon, Ned McKendry, Alex Graham and Jarrod Killey clocked 7:13.62 to be ninth fastest in the heats, failing to book a spot in the eight-team final.
The US led the way into the final in 7:08.05.
Belinda Hocking (2:07.64) was second fastest in the 200m backstroke heats behind Missy Franklin (2:07.57).
Tommaso D'Orsogna (52.82) and Chris Wright (52.83) missed the men's 100m butterfly semis.