Of course it was undeserved. How can you be allowed to win a two legged tie when you haven't created a chance over two legs and worse still, have barely even tried to create a chance. I hope Zenith destroy them tbh. It would be a victory for attacking football. Knowing the way European football is at the moment though, Rangers will shut up shop, play for pens and win it.
Not sure what you expect them to do, tbh. We're talking about Rangers, here, not Barcelona. Play to their strengths.