Rejected nomination for tennis courts

I've seen tennis courts as pokestops all over the place but one of my nominations for a set of tennis courts got rejected because "The nomination does not appear to be visually unique." Are reviewers being rejecting this because they are being extra critical or am I missing something?
Answers
Yes Tennis Courts are generally well accepted. Judging by the reason I would ask 3 things -
Is there another tennis court PoI nearby? E.g. if this is 'Court #2' for a set of courts in the same place, then the reviewers will/should reject (although I would expect this to come back as a duplicate, not a visually unique rejection)
Are the courts run down and not in use? If so they may appear just like a bituminised court, i.e. not very visually appealing
Was the submission photo actually showing the courts? If the photo was bad you may have lost some reviewers on that
Are any other tennis courts there already in the database?
In place where you nominating tennis courts as POI, is it already accepted some of tennis courts? How big is that area and how many courts are there?
Bumping up this thread because of a weird rejection I just got. "Not historically or culturally significant." This is the only tennis court on the premises (there are some not far across the street for a sister apartment complex, but definitely distinct). Not a game duplicate that I could tell. Courts are actively used and in good shape. There is a typo in the description, but pretty sure that's not a fatal flaw. I'm scratching my head.
This rejection reason often erroneously appears if some reviewers marked your nomination as a duplicate, but not enough reviewers did this to actually trigger the duplicate message. As you say, there doesn't appear to be any existing wayspots here, so it seems like you may have got lazy reviewers who saw the other tennis courts (which aren't even that close in the grand scheme of things) and they marked is as a duplicate without checking.
The only thing I will ask is did you give the nomination a similar name to the existing tennis court submission that's nearby?
Ah, yes, it did have a similar (not identical) name, since several of the apartment complexes in that area have variations on the name "River Run." Argh.