Nigerian international Efe Ambrose played for 45 minutes in his second match since rejoining his club teammates from World Cup duty.
Wholesale half-time changes and a second period slump saw Celtic settle for a score draw with Dynamo Dresden in scorching conditions.
The former Ashdod defender who is expected to feature in Tuesday’s Champions League second qualifying round return leg against Icelandic opponents KR Reykjavik at Murrayfield was replaced by O’Connell.
Ronny Deila started different teams in each half but new goalkeeper Craig Gordon was certainly not treating the match like a bounce event as the Glucksgas Stadion played host to a new beginning for the popular keeper.
Meanwhile, Celtic will face either Legia Warsaw or St Patrick’s the following week if they advance to the next round of the Champions League.