Yeah, a one off. Let's get Javier Jardim, ex Monaco. He made CL semis too. Or Rudy Garcia, ex Lyon.
One-off? Ok, you are deluded if you think that.
Monaco or Lyon or whoever else has made CL semis by sitting back and counter.
Panathinaikos has won like that in a CL semi against the great Ajax of LVG.
So what?
Ten Haag reached Cl semis by going out and attacking, pressing high, playing in other words like a big team.
And Ajax qualified by bossing like that BOTH juve and madrid AWAY from home.
Good luck finding another not top club that has reached even a semi playing like that.
Then, he is winning Eredivise every year by demolishing all opponents scoring 5 and 6 goals
And he still plays fantastic football in CL every year, even losing every year his best players to top clubs (De Jong, De Ligt, Ziyec, etc)
going out of the competition only when facing teams with 100 times the budget Ajax has