Mertens packs for Naples

Dries Mertens has 19 caps for Belgium. Credit: PA

Napoli have completed the signing of Belgium winger Dries Mertens on a five-year contract for an undisclosed fee.

The 26-year-old becomes new Azzurri head coach Rafael Benitez's first signing at the Stadio San Paolo following two successful seasons with Eredivisie club PSV Eindhoven.