Kroger’s proposed merger with fellow grocery chain Albertsons ended in acrimony this week as a judge granted the Federal Trade Commissions’s request to block the deal on antitrust grounds. Albertsons then sued Kroger for allegedly not fulfilling its contractual obligations.

Albertsons is giving up on its merger with Kroger a day after it was rejected in two courts and it is suing the chain, saying it didn’t do enough to secure regulatory approval of the $24.6B agreement.

The supermarket chain had tried to join forces with Kroger, but judges sided with federal and state regulators who charged that the merger would reduce competition.