I missed the first 12 or so min but for the rest of the game, they had very few real chances, mainly towards the end of the game and in ET when Chelsea's CBs were showing signs of exhaustion as they had just come back from injuries. For the most part, Bayern's pressure and possession were pretty ineffective as they were largely reduced to half-chances and/or desperate shots from a distance with their players being hurried and hassled away from the goal.
This, tonight, is very different story as the Germans don't even have to try to get themselves in scoring positions.