Niall Kearney and Jonathan Caldwell enjoyed solid final rounds but just missed out on the top 20 at the Gran Canaria Lopesan Open which was won by South Africa's Garrick Higgo.
Dubliner Kearney, who had got himself within six shots of the lead on Saturday after an excellent third-round 64, carded a 68 on Sunday to finish on 14 under and 11 shots behind the eventual winner.
Caldwell joined him on 14 under in an eight-way tie for 21st after a final round 66 at the at Meloneras Golf course.
But it was overnight leader Higgo who maintained his momentum to claim the overall tournament victory by completing a repeat of his third-round 63.
He finished on 25 under in a bogey-free round that also included an eagle on hole four.
"It's unreal, I can't put it into words," Higgo, who won the Open de Portugal in September last year, told Sky Sports. "It feels amazing.
"The birdies on nine and 10 were big for me in terms of my confidence. But it wasn't over until the last hole really, I knew anything could happen especially with the wind coming up. It was a bit stressful.
"My game feels good. I've worked really, really hard with my coach and everyone back home."
A week on from losing out in a five-hole play-off at the Austrian Open last week, Maximilian Kieffer of Germany was runner-up, three shots further back after a 62, with low-scoring the order of the day throughout much of the field across the weekend rounds. His round included an eagle and seven birdies.
Denmark's Jeff Winther completed the top three on 21 under after a 64.