Athletic Bilbao must be MERCURY. Just look at mercury. It's starting in the 7th house, which is average strength, then moves into the 6th house it's natural house after 5 minutes into the match. Mercury is in Virgo, which is domicile. That's the most powerful powerful planet in this chart. (Red/white stripes are Mercury; Black is the Virgoan colour).
Barcelona? They played in Yellow + Navy Blue. Looking at the colour spectrum, they can be Aries, Gemini or Aquarius. Obviously Bilbao are Mercury, so they must be Mars or Saturn. Mars in 6th is house of joy, but not for long; and Saturn in 8th must be a weak placement.
Bilbao ==> Mercury.
Barcelona ==> Saturn.