Donald Sterling move ahead with a $1 billion lawsuit against the NBA, his attorney confirmed on Monday, and he has withdrawn his support of the sale of the Los Angeles Clippers to former Microsoft CEO Steve Ballmer.

Attorney Maxwell Blecher said that the lawsuit was back on, a turnabout after Sterling had decided last week to drop his litigation and back the sale, which was negotiated by his wife Shelly. The suit was filed in federal court in Los Angeles on May 30.

The Associated Press reported that Sterling changed his mind after learning that the NBA wouldn’t revoke his lifetime ban and fine after a tape was made public in which he was heard making racist remarks to his girlfriend.

Sterling’s lawsuit against the the NBA alleges violation of antitrust laws, among other allegations.