FOOTBALL : REASONS WHY MAN CITY LOST TO CHELSEA

The following are the reasons I think Man city lost to Chelsea :

• Man city underated Chelsea,since they were used to scoring up to 5 goals against an opposing team
• Chelsea somehow may have rated Man city highly and therefore put in their very best in the match
• Fans may have rated Man city above their capabilities,since they've been playing against only smaller clubs.
• Man city became somewhat confused during the game after Chelsea scored the first and only goal in the match.
• Striker Aguero has an injury,and so Man city lost some chances that may have resulted in goals.

The above are the reasons I think is responsible for Man city's loss or what do you think?