Ciara Mageean and Rhasidat Adeleke were the star Irish performers at the European Athletics Championships in Munich.
Both women qualified for their respective finals after superb performances - albeit Adeleke had to nervously wait for confirmation of her spot in the 400m decider as she made it as one of the two quickest non-automatic qualifiers.
She had finished third in her semi-final with a time of 51.08s, only being overtaken for second in the latter stages by Belgian Cynthia Bolingo.
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Olympic bronze medallist Femke Bol of the Netherlands took first.
It's the latest remarkable achievement for the Tallaght sprinter who is still only 19.
It's been a year to remember for the University of Texas student as not only has she set national records in the 60m, 200m, 300m, and 400m but she's also had to endure a mammoth grind as this was the 48th race of her season.
She'll run out of lane 1 in the final on Wednesday night which is scheduled to take place at 9.02 pm Irish time.
Down native Mageean meanwhile booked a more comfortable passage to Friday's 1500m final as she came second.
Having led at halfway, she was able to ease up towards the end as she was assured of a top four placing and therefore automatic progression.
Despite that, it was still a season's-best time of 4:03.03.
It continues a rich vein of form for her on the back of her silver medal over the same distance at the Commonwealth Games.
Afterwards, she told RTE that she had plenty more in the tank as she had eased down on the throttle late on with the final in mind.
She said: "I could see the positioning down the home straight, I could see it up on the big screen and I knew I didn’t need to race Ennaoui to the line because I was safe in the top four. I’ll save that for the final on Friday
"I know I am in better shape than 4:03. I’m prepared for a final that will be much faster."
However, there was disappointment in the first 1500m semi-final for Sarah Healy as she failed to produce her best resulting in her winding up in 11th at 4:10.75.
Similarly, it was a disheartening day for Chris O'Donnell whose fifth place wasn't enough to secure a place in the 400m men's showpiece.
The Sligo native needed to post a time around his PB mark of 45.26 which he had set just two months ago but could only muster 45.73.
The best of the Irish male athletes was Donegal's Brendan Boyce in the final of the 35km walk.
He steadily moved up the standings throughout the second half of the race, ultimately finishing in 9th after clocking 2:38:03.
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