BARCELONA (Reuters) - Barcelona's rock-solid defence will be put to the test as they look to take a big step closer to a first league title in four years with victory over rivals Real Madrid at the Camp Nou in El Clasico on Sunday.
Barca, who hold a nine-point advantage over their rivals at the top of the table, have won 21 of their 25 matches this season, losing only one of their last 16 games.
