It could just be the injectors. The tfsi injectors make that sort of noise. As far as I'm aware the best way to distinguish the injector noise from the bad chain, tensioner etc noise is
If it's is a higher pitch tapping that you can hear from the front of the car and from the engine then it is probably the injectors which is normal
If you get in the car with the doors closed and the car is up to temp, and it is a deeper noise you can hear which is seperate from the injector noise then it is the chain etc.
Hope that makes sense. It may be wrong but that's what I've been led to believe