Justice Sonia Sotomayor, the court's newest member, got to deliver the Supreme Court's first opinion of the new term.
It was also Sotomayor's first opinion as a Supreme Court justice. She joined the court in August.
Sotomayor read aloud the opinion she wrote at the beginning of Tuesday's court session.
The case was Mohawk Industries v. Carpenter. The case involved a question of whether a lower court's decision on attorney-client privilege can be appealed to a higher court.
The Supreme Court agreed that the federal judge's decision releasing documents created by Mohawk Industries' lawyer could not be appealed. The judgment of the court was unanimous.