I would say that this is the best chance for Lin Dan and Chen Yu to come out of Chen Hong and Xia XZ's shell. They will have only themselves to blame if they fail to seize this golden opportunity to bag the title, since the coach will NOT prevent them from winning this time!
Wong CH has a clear path ahead of him now and his goal must definitely be set on the gold! But of course, Lin and Chen will try very hard to capture it as they can only meet in Finals!
It seems like your information wasn't exactly accurate : Chen Hong is playing his quarter final at this very moment!!!
But I think it's indeed that Chenhong has injured. Maybe Chenhong himself think he could play the quarters. But I think he would lost from the first game's score 15-5.
I think he over strain himself from the previous tournaments.. and all of them held so close to each other.. its time for him to take some rest