Pierre-Emerick Aubameyang fired Barcelona back into second place in La Liga after a narrow victory at Real Sociedad.
The Copa del Rey derby match between Real Betis and Sevilla was suspended after a pole hurled from the stands hit Sevilla player Joan Jordan in the head on Saturday.
Sevilla cut into Real Madrid's lead of La Liga after winning at Cadiz 1-0 on Monday, while Oihan Sancet scored a hat-trick for Athletic Bilbao.
The referee's report has given more details around the alleged racist incident during Valencia's match at Cadiz on Sunday.
Zlatan Ibrahimovic made a winning return to the AC Milan team as his quickfire double won the Milan derby, while Real Madrid and Barcelona suffered shock defeats.