That could be it in terms of additions to a backroom team that lost Michael Carrick but retained the likes of Kieran McKenna and Mike Phelan.
David Wagner's brigade got into too difficult a group.
Cristiano Ronaldo fashions his own chance, closing down Mohamed Ali Camara to force a mistake deep in the Young Boys half.
All of the Premier League sides will be hoping to win the Champions League this season, but Joe Cole claims the English sides could dominate this year's competition.
Rangnick said: "So far I'm very happy to work with the staff I have met last week and they gave me a lot of help in the last couple of days in preparation of the Crystal Palace game.
Early on it looked like the substitutes would impress their new manager as Luke Shaw assisted Greenwood's opener in the 9th minute.