Northern Ireland's Michael Hoey finished in a share of 22nd place at the Czech Masters after a closing one-over-par 73 in Prague.
Nine behind leader Thomas Pieters heading into the final day, Hoey was unable to summon up a charge as he finished 13 behind the Belgian.
Damien McGrane earned his first top-10 finished of the season as a closing 68 left him sharing eighth spot.
Kevin Phelan finished in a share of 57th on three under after a closing 73.
Hoey parred his opening nine holes at the Albatross Resort before picking up his lone birdie at the 10th.
However, Hoey then double bogeyed the 11th before matching the card on his concluding seven holes.
Belgian Pieters clinched his first European Tour triumph as a closing 69 left him three clear of Sweden's Pelle Edberg with England's Matthew Fitzpatrick in third spot.