Clasie, 21, insists he's happy in the Eredivisie.
"I can confirm the interest in Fiorentina for me," he told nusport.nl. "They came forward at the end of the season.
"But I have never thought about leaving Feyenoord.
"I am glad I renewed my contract that binds me to the club for years to come.
"I'm still not ready to leave Holland."