Of course, the FIFA rule that you have to play both friendlies in the same confederation makes it harder to find an opponent outside of your own confederation. Representative teams shall play the two matches within an international window on the territory of the same confederation, with the only exception of inter-continental play-off matches. If at least one of the two matches is a friendly, they can be played in two different confederations only if the distance between the venues does not exceed a total of five flight hours, according to the official schedule of the airline, and two time-zones. With Euro teams increasing tied up with Nations League and Euro qualifying, it's getting tough to get opponents. This last window as almost all Concacaf vs. CONMEBOL, strangely with no CONMEBOL wins.