The REG defines "opponent" as follows:
Opponent
An opponent is any other player in the game. However, the word opponent can be specific or general. Normally, when a single opponent is indicated, the player may select any other player and target him or his cards. “Opponents' ” or “each opponent” refers to all other players in the game.
During the Battle Phase, however, the specific “opponent”, “your opponent’”, or “opponent's” means the other player engaging you in battle. The general “an opponent”, “any opponent”, or “one opponent” can still be selected by the player.
Based on the underlined portion above, does this mean that in a TEAMS game, all cards controlled by my TEAMS partner are defined as my "opponent's"?