Serie A star assaulted by his own fansFollowing the club's 3-1 defeat, the striker was set upon by home supporters as he stepped out of his car in the car parkWTFSassuolo
WATCH: Mertens's stunning free-kickThe diminutive Belgian scored his 20th goal of the season with a beautifully-struck set-piece from range in the club's league meeting with EmpoliVideoSSC Napoli
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