Regardless of whether Warriors coach Don Nelson returns to the sidelines next season, his fall schedule is likely to include a stop in court, where his arbitration suit against Mavericks owner Mark Cuban is taking on new dimensions.

According to a source with knowledge of the situation, Cuban filed a counterclaim against Nelson last month, contending that the former Mavs coach violated his non-compete clause by using insider information against Dallas during the playoffs.

The source also said that Cuban is seeking an injunction against Nelson working for Golden State, though the litigation has no bearing on Nelson's pending decision on coaching again or retiring.

Reached by phone this week, Nelson's lawyer, John O'Connor, would say only that the Cuban's claim was baseless, particularly the notion about inside information.

"I suppose if Don knows that (Dirk) Nowitzki likes to go to his right and not his left, that that is confidential information as far as Cuban is concerned," O'Connor said. "We disagree and think it's absurd."