Leipzig are not a bad club, but like everyone else I think they will be unlucky in the return game. Manchester City have played poor away games recently, but they play much better at home. Although even in the last match their stats were better than Leipzig's. I think they can win the next game, although I agree that the unexpected outcome of the match cannot be ruled out.
The game is still open even though Manchester City are the favorites to go through but Leipzig could pull off surprises. Luckily for them the away goal advantage in longer used. They could just sit comfortably and maybe have to counter Manchester city when the opportunities arrived. City look shaky on counter yesterday which clearly shows that without Debruyne they suffer to create clear cut chances. How city will perform in the second leg will greatly be influenced by Debruyne. I expect a Leipzig passage to the last eights should he not be available