Accusing the players of failing to bargain "in good faith" and of "impermissible pressure tactics" in labor talks, the NBA has filed an unfair labor practice charge and a federal lawsuit against the NBA Players Association.

The claims were filed Tuesday.

The unfair labor practice charge was filed with the National Labor Relations Board. It accuses the players of making "unlawful" threats to break up their union and pursue an antitrust lawsuit against the NBA, a strategy used this year by NFL players to fight their lockout.

The lawsuit was filed in federal district court in New York. It asks the court to declare the NBA lockout does not break antitrust laws. The NBA also says it wants to void existing player contracts if the NBPA sheds its union status.