How many hours was that? What was the general breakdown of time and intensity for the week?
880 wouldn't be a lot for me, but it would be more than a lot would do with any regularity. My CTL is 150 so that means basically 1050. If this was an atypically high week for you then you will probably pay for it later
I totalled 12:34 for the week. Tuesday was about 2:30 with some SST and then 1-5' vo2 max intervals. Tuesday was a hard 2:00 group ride. Wednesday was about 1:25 of z2 on the rollers, thursday was 2:30 with about 1:30 of tempo and an hour of borderline z2/z3, and yesterday was an unstructured 4:00 with a group and with lots of climbing. It has definitely been a hard week.
I can't really imagine holding my ftp for an hour without killing myself along the way. But from the sounds of it, that is normal.