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When Athletic Bilbao's right-back Andoni Iraola danced his way into Manchester United's penalty box, it demonstrated how technically adept the Bilbao players were.
It's a surprise to anglocentric football viewers, but it's no surprise to football aficionados.
Bilbao taught Manchester United how to play football in the first leg and the second leg.
Tactically, Marcelo Bielsa has prepped every single one of his players on their role from a defensive and attacking perspective.
To Manchester United's credit, they made the scoreline look relatively close in both legs.
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