Mertens said, "It was an awful moment for me, so I can only imagine how those who lived through his time at Napoli must have felt.
“He made such a big impact on this city and for everyone in the south of Italy. I want to be positive, and focus on my memories of a smiling man who loved football.
“It was tough to pull that shirt on. In some ways, it was always a dream, but not like this."