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Euro 2012 this summer set a real benchmark for international football.
The 4-2-3-1 was the most popular formation by far, outgunning the 4-3-3 utilised by Paulo Bento and Fernando Santos or the 4-4-2 variants favoured by Roy Hodgson and Cesare Prandelli.
Croatia, Czech Republic, Denmark, France, Germany, Netherlands, Poland, Sweden and Ukraine—a staggering nine out of 16 teams—all used the 4-2-3-1 as their main formation during the tournament.
The trend isn't unique to Europe, and with it appearing frequently across the top leagues worldwide, international coaches will be happy to pick it up.
One of the major issues with international football is the lack of playing time squads have together, so managers rarely try to implement anything too unorthodox or complex.