I'll focus this mainly on the 4 major tennis championships a year. Does the host broadcaster provide the international feeds or is it one pool feed that everyone agrees upon. For example, ESPN holds the US broadcast rights to the Australian Open, as well as Wimbledon they show every match on ESPN3 and also on DirecTV. They also own the rights to the US Open. Are they considered the host for the US Open and provide the master feeds. Or is there an agreed upon IBC that handles production of everything.