Kascak (second from left) celebrates his goal with his team-mates
Aberdeen suffered another heavy Europa League defeat as Sigma Olomouc completed a handsome third qualifying round aggregate win.
The Dons, trailing 5-1 from the first leg, fell behind in the sixth minute when Tomas Janotka fired home.
Marek Kascak converted a 13th-minute penalty and Michal Hubnik's injury-time strike made it three before the break.
Goalkeeper Jamie Langfield prevented the visitors falling further behind when he saved Michal Ordos' spot-kick.
Manager Mark McGhee had stressed before travelling to the Czech Republic that he wanted an improved defensive performance following last week's loss at Pittodrie.
But Olomouc once again breached the Aberdeen backline early in the second leg encounter.
Tomas Horava struck the post and, from the rebound, Janotka found the top corner.
Chris Maguire twice threatened a quick reply for the visitors before Olomouc doubled their lead on the night.
Janotka was fouled in the penalty box by Mark Kerr and Kascak sent Langfield the wrong way from 12 yards.
Aberdeen continued to come under pressure as long-range efforts from Ladislav Onofrej and Horava drew saves from Langfield.
Scorer Hubnik (right) holds off Darren Mackie
At the other end, Sone Aluko's effort was claimed by Petr Drobisz and Lee Miller headed over from Charlie Mulgrew's corner.
Langfield blocked Hubnik's header and another shot by Horova before Olomouc completed their tally for the tie.
Hubnik escaped the challenge of Mulgrew and sent a low drive into the net.
The home side won a second penalty just after the restart when Langfield was adjudged to have felled Jakub Petr.
But on this occasion the Scotland squad goalkeeper was equal to the spot-kick attempt, pushing substitute Ordos' shot wide.
Horova's replacement Ordos was again frustrated by a Langfield block and the keeper also prevented Petr from finding the net.
Pavel Sultes, who came on for Petr, was unsuccessful with several attempts at Langfield's goal and Rudolf Otepka was foiled by the keeper late in the match.
Sigma Olomouc will be unseeded when they go into Friday's draw for the play-off round, which precedes the group stages of the competition.
Olomouc: Drobisz, Dreksa, Skerle, Bajer, Kascak, Onofrej, Daniel Rossi, Horava (Ordos 46), Janotka, Hubnik (Otepka 66), Petr (Sultes 58). Subs Not Used: Lovasik, Murin, Veprek, Caihame.
Bookmark with:
What are these?