Celtic began their pre-season programme with a goalless draw away to Bundesliga side Augsburg.
In front of around 4,000 fans at the SGL Arena, the hosts had the better of the game but could not find a way past Hoops keeper Fraser Forster.
Daryl Murphy hit the post for the Clydesdale Bank Premier League side as the match petered out into a draw.
Elsewhere, SPL newcomers Ross County drew 1-1 with Irn-Bru First Division side Raith Rovers in Kirkcaldy.
Confusion in the home defence allowed Sam Morrow to put County ahead in the eighth minute but the impressive Grant Anderson crossed for Brian Graham to head an equaliser eight minutes later.