Use of wing backs will only put teams in a flap

With the use of wing backs decreasing in the modern game, Chile coach Marcelo Bielsa has set his side up to play in an intriguing 3-3-1-3 formation but he must be wary of the it's weaknesses.
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Three years ago, during England's ill-fated 2008 European Championship Qualifiers, then manager Steve Mclaren made a bold move which shocked and surprised everyone; he was to play a 3-5-2.

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