US coach Juergen Klinsmann warned on Monday favorites Mexico and United States will face a difficult fight to reach the 2014 World Cup finals in final-round qualifying that starts on Wednesday.

"There's no easy way, not for Mexico, not for United States, not for anybody," the former German international star said. "You have to work hard. You have to get your points. You have to respect every opponent."

The Americans will open at Honduras, while Jamaica's Reggae Boyz visit Mexico and Panama will play host to Costa Rica to kick off 2013 Confederation of North, Central American and Caribbean Association Football qualifying.