Garcia arrived at the Etihad Stadium in August 2012 but initially struggled to reproduce the form that convinced Roberto Mancini to pay a reported £16million to acquire his services.
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"At the beginning it was difficult, but now I can speak a little bit with my friends," he is quoted as saying by Sky Sports News.
"When you feel good off the pitch, you feel better on it. Maybe this season after Christmas I have done my job better.
"When you play regularly, you can show your quality, and the most important thing for me is to win three points and keep working for the Premier League title.
"Maybe six months ago, 10 months ago, people maybe didn't say anything good to me and now I try to do my job.
"Now maybe the fans are happier with me, but I just try to do my job.
"I feel better now in the country, in the team and in the club."