Athletic Bilbao came to Old Trafford and stunned Europe by defeating Manchester United 3-2.
World football aficionados weren't too surprised—they knew all about Marcelo Bielsa's little dynamos and how they emulate the classic Spanish "tiki-taka" playing style.
While a few of the stars on show are already renowned and linked to moves to bigger clubs, some of them have gone by unnoticed—until now.
Here are six players who could star in the English Premier League if given the chance.
Enjoy the slideshow!