For Australian and USA feeds it is not possible to directly uplink to 7.0E or 10.0E. Any feeds from these locations on 7.0E and 10.0E would be 2nd hop via an intermediate ground station which received the feeds either via fibre or satellite. In the case of USA feeds it is known that both 47.5W and 55.5W have been used for transatlantic Novelsat satellite transmissions.
Yes you are right, but this is satellite. Fiber would be a different story.
I'm not sure that WTA feeds (women tournements) are ALWAYS broadcasted ONLY via fiber.
If so, why not the same for ATP (men) tournements? ATP is at 7 East, and these feeds are not related to the tournement location.
For exampe, this week we have the feed at 7 East from Indian Wells, probably pushed to Europe via 55 West or 47.5 West on C band (i don't know).
So I believe that WTA has its own satellite feed too, at least as backup. And in Europe it must be on one of the main satellites like 7 East or 10 East or similar, but surely not in DVB-S2. This is the reason for which I thought to NS4. Well, I can wrong, obviously.