"The first thing you do when you get a court judgement is to read it very, very carefully. And we are still in the process of doing that. Of course, it's a loss, because it was an annulment by the court," Vestager said during an online event.

"The only comfort here is that the court agrees with us that we can use state aid tools to look at fiscal state aid as well. But now we read it very carefully, and then decide on next steps," she said.

(Reporting by Kate Abnett, editing by Marine Strauss)