Celtic rounded off their pre-season tour of Austria with a 0-0 draw against Czech outfit Dukla Prague on Friday evening.
Ronny Deila's team had already beaten Krasnodar and LASK Linz, either side of a draw against Rapid Vienna.
Celtic now face KR Reykjavik in the second qualifying round of the Champions League on Tuesday, with the return leg at Murrayfield on Tuesday July 22.