Analysis: Four things we learned in Spain's Matchday 15

MADRID, Dec. 4 (Xinhua) -- Real Madrid and Girona both won this weekend in La Liga to retain first and second place, while Barcelona defeated Atletico Madrid and the Williams brothers shone as Athletic Club Bilbao scored four. Here are four things we learned in La Liga this weekend.

1. BRAHIM DIAZ PROVES HIS POINT AT REAL MADRID

For a good part of the season it looked as if young attacking midfielder, Bra