Celtic defeated Austrian side Sturm Graz 1-0 in a friendly match on Sunday as they continued their preparations for the Champions League qualifiers.
Ryan Christie scored the only goal 10 minutes before half-time as Brendan Rodgers' men followed up the 2-2 draw with Slovenian side Celje with victory in the Merkur Arena.
Celtic begin the defence of their Ladbrokes Premiership title against Hearts at Tynecastle on Sunday August 7, live on Sky Sports with a 2.15pm kick-off.