Conte said Europe needed to step up collaboration to develop new strategic sectors and boost champions in areas like the auto sector, where Italy's Fiat Chryselr and France's PSA Group are preparing to merge.

"We want to grow our European champions, I'm thinking of projects in the automobile sector," Conte said at a joint news conference with French President Emmanuel Macron in Naples, adding that competition rules should be looked at.

"They were rules developed for the single market but in some case they are evidently not all rules for competing in a global market," he said.

(Reporting by James Mackenzie, editing by Valentina Za)