"I need to settle more to English football. I knew it would be difficult and it's going to take me more time to get used to it," said the Chilean winger.
"I know I must do more, but I'm confident I will. I know sometimes people don't understand that you can make mistakes in a game and things don't always look perfect immediately, but I'll keep on working.
"I know in football it's not normal for people to be patient, but we all understand that will be the case until we do our best on the pitch and win more games.
"I just have to keep working hard to get myself fitter. It's a demanding league and it's not the same working on physical training as playing in games.
"The best way to adjust is always to play as much as possible, and at the moment I'm doing that."