Gary Hooper and Anthony Stokes scored late goals as Celtic rounded off its pre-season tour of Germany with a 2-1 win over Aalen at the Scholz Arena.
Victor Wanyama started for Neil Lennon's men after joining up with the squad late after international duty, but the Hoops were stunned by Benjamin Hubner's fourth-minute opener.
Hooper notched Celtic's first goal of its tour when he tapped home the opener in the 64th minute, and Stokes fired through the goalkeeper's legs to wrap up victory in the 77th minute.
Motherwell was held to a 1-1 draw by Raith Rovers at Starks Park. Jamie Murphy put Well in front early in the second half, and Paddy Clark headed Raith's equaliser seven minutes from time.
Daniel Moore's eighth-minute penalty gave Third Division Elgin a 1-0 win over Aberdeen, while SPL new boy Ross County was held to a goalless draw at Nairn County.