Daniel Craig and Harrison Ford’s science-fiction Western “Cowboys & Aliens“ and the family adventure “The Smurfs“ both opened with $36.2 million, according to studio estimates Sunday. Studios jockey for the top box-office spot to earn “No. 1 film in America” bragging rights in advertising for the coming week. Going into the weekend, “Cowboys & Aliens” seemed to have the edge, with analysts figuring it might top $40 million, while “The Smurfs” might come in around $30 million. But the two movies met in the middle, “Cowboys & Aliens” doing worse than expected and “The Smurfs” doing better. Final numbers will decide the winner later today. The previous weekend’s top movie, “Captain America: The First Avenger,” slipped to No. 3 with $24.9 million and raised its domestic total to $116.8 million. “Harry Potter and the Deathly Hallows: Part 2“ pulled in $21.9 million to become the franchise’s top-grossing chapter at $318.5 million domestically.