Team Ireland endured a mixed day at the 2019 World Championships in South Korea.
Shane Ryan was first in the pool as he went in the 100m backstroke heats, but was unable to progress.
Ryan was seventh in his heat, but with a decent time of 54.24, leaving him .2 of a second away from qualifying for the semi-finals.
Niamh Coyne was up next for Ireland in the 100m breaststroke but was hit by an early set-back when she lost her hat early on, which she struggled to recover from.
Coyne finished in a time of 1:10.16, leaving her well outside the qualifying time.
Jordan Sloane also failed to progress from his 200m freestyle heat but will be satisfied by his time of 1:48.60, which was his best performance at a summer benchmark event to date.
Elsewhere at the Championships, Britain's Adam Peaty won his third consecutive 100 metres breaststroke world title.
Peaty, who set a world record on Sunday by swimming 56.88 in the semi-finals, touched home in 57.14, ahead of compatriot James Wilby (58.46) and China's Yan Zibei (58.63)