Chelsea full-back Filipe Luis says he has been shocked by the difficulty of the Premier League.
Luis, 29, joined Chelsea from Atletico Madrid last summer after helping the Spanish club to the Primera Division title.
Atletico were crowned champions ahead of Real Madrid and Barcelona last season, but the defender believes English football is proving to be far more competitive than it is in Spain.
"In Spain you fight, of course, against Real Madrid and Barcelona, and they almost never lose because they have the biggest squads and they are two of the biggest clubs in the world. So it's really difficult," Luis is quoted as saying by the Evening Standard.
"In the Premier League the big clubs can lose and drop points. Games that are supposed to be easy are never easy. That's why we, and other teams, lose points.
"In Spain it takes the mid-90s or over 100 points to be champion, but here with Chelsea it is going to take a little less. But in the same way as Spain, we have to try to win all the games."
Chelsea currently sit top of the Premier League table with 70 points -- seven more than second-placed Arsenal, having played a game less than Arsene Wenger's side.