Four things we learned in Spain's matchday 8

MADRID, Sept. 30 (Xinhua) -- Matchday 8 in La Liga featured a Madrid derby halted due to the actions of a section of Atletico supporters, while Barcelona suffered their first league defeat of the season and things got worse for Valencia. Here is what we learned in Spain this weekend.

1. It's time for Atletico to act against their ultras

The derby between Atletico and Real Madrid is always one of the games