Nancy set up with a 3-4-3 like his Columbus Crew days, breaking with the back four tradition of Celtic predecessors Martin O’Neill, Brendan Rodgers and Ange Postecoglou.
In practice, that meant left-sided defenders Auston Trusty, Liam Scales and Tierney acting as the last line of defence with Yang Hyun-Jun and Tounekti set up as wing-backs and midfielders Benjamin Nygren and Reo Hatate supporting striker Maeda.
Much like Postecglou’s tenure, Celtic were aggressive early on, making it difficult for their opponents to get out.
Quality in the final ball was lacking in the opening half, however, and attempts at goal in the second period did little to trouble Schwolow, until Tierney smashed home a loose ball.
It should be noted, though, that injured players like Cameron Carter-Vickers, Alistair Johnston and Jota will likely fit more naturally into this new formation.