Analysis: Four things we learned in Spain's Matchday 4

MADRID, Sept. 15 (Xinhua) -- The fourth round of games in La Liga saw Real Madrid continue its excellent start to the season, while Barcelona smashed Valencia and Atletico Madrid showed signs of life. Here are some things we learned in Spain this weekend.

1 Mbappe makes the difference as Real Madrid win with 10 men

Kylian Mbappe continued his fine start to the season as Real Madrid won 2-1 at Real Socieda