Just one day after Evan Chesler argued to the U.s. Court of Appeals for the Second Circuit in 2015 that a judge was wrong to block American Express from using anti-steering rules to prevent merchants from favoring other credit cards, the veteran litigator got word the court had vacated the injunction.

It wasn’t the end the case, but it was good news, delivered fast, and a clear sign to the Cravath, Swaine & Moore chairman that Amex would prevail in its 10-year fight against the Justice Department’s Antitrust Division.