It was a mixed day for Ireland in the pool.
Shane Ryan progressed to the semi-finals of the 100m backstroke after breaking the Irish record in the heat. He will be back in the pool in the early hours on Monday morning.
There was disappointment for Fiona Doyle though in the heats of the 100 breaststroke - her specialist event.
The Limerick swimmer finished .26 of a second outside of the semi-final places with a time of 1:07.58. That's .46 short of her Irish record. The 24-year-old placed eighth in the heat and 20th overall. The 16 fastest went through to the semi-finals.
Speaking to RTÉ after the race, Doyle's disappointment with her performance was clear.
It's been fantastic. I've loved every minute of it.
I felt absolutely fantastic in warm-up - better than I've ever felt in my whole life.
To not progress on... I'm devastated.
Here's the interview.
Fiona Doyle tells @OFlynnPaul that she is "devastated" after her disappointing 100m breaststroke heat #rterio2016 https://t.co/kpUZyo4EOd
— RTÉ Sport (@RTEsport) August 7, 2016
And the heat.
1:07.58 for Fiona @Fionamdoyle in the 100m Breaststroke Heats in #Swimming Hard luck Fiona! #TeamIreland pic.twitter.com/bZWi2yPSD7
— Team Ireland (@olympiccouncil) August 7, 2016