Oh crap !
What are the odds?
Well, I'll stick with my London-based arrival flights in Dubrovnik.
Chateau, I am not saying you are wrong. However, please examine the information below and draw your own conclusions:
There are many flights every day from Zagreb into Dubrovnik. they start at 0545 and end at 2120. Any flight arrivals into Zagreb an appropriate connect time ahead of any of those flights will allow a single connection from an originating city to Dubrovnik. The list of cities from which you can fly nonstop to Zagreb is huge:
Major European Capitals/Cities
Paris - CDG
Rome - Fumicino
Cities of Forner Yugoslavia
There is no need for teams to fly nonstop to Dubrovnik. If so, the above indicates a wealth of places they could originate from.