looks like we can play 11 nationality at the same time

Spain -- Netherland -- ivory coast
--- England ------------ Welsh -----
-------------cameroon--------------
brazil - german - belgium - france
------------- poland ----------------

russian --- korean --- israel
------ czech ----- welsh ---------
------------- england --------------
brazil - german - swiss - france--
-------------poland ----------------
i guess the best formation should be

spain --- netherland -- ivory coast
----- russian ------ england -------
----------- cameroon --------------
brazil - german - belgium - france
--------------poland-------------------