Irish youngsters Johnny Kenny and Rocco Vata impressed as Celtic ran out 7-0 winners against Wiener Viktoria.
Ange Postecoglou's men were back in action as they prepare for the 2022/23 season and it was the Irish stars that stole the show.
Former Sligo star Johnny Kenny opened the scoring with an early tap in before Reo Hatate scored a second and Mikey Johnston added a third.
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But it was Kenny who was the starring light as he banged in his second with a left footed volley and was close to a hat-trick after hitting the post with a header before Christopher Jullien stole the rebound.
The Hoops rung the changes at the break and replaced captain on the night Joe Hart with Benjamin Siegrist for his Celtic debut. Alexandro Bernabei also made way after making a good first impression.
The tempo dropped after the break, but the introduction of Irish youngster Rocco Vata and Owen Moffat saw it pick up again. The former sprung the offside trap to race in on goal and complete the scoring with a seventh, but it had turned into a training exercise for the Scottish Premiership champions long before then.
It's now on to Vienna, where Celtic will renew rivalries with old foes Rapid Vienna in the second friendly of the trip.
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