Napoli winger Dries Mertens expects former PSV Eindhoven teammate Memphis Depay to move to a big club this summer.

Mertens left PSV two years ago for Napoli.

"He's ready," the Belgian told Voetbal International.

"Depay is heading for one of the biggest clubs in Europe.

"Why? I was good in a team that came up short. Then I was watched by other clubs. When you're in a winning team, it is pretty different for you."