However, the Czech Republic international says he's happy in Florence.
He said at his Czech Republic media conference: "In January I also consulted with the technical staff of the national team. I was looking for the best solution for me, to be able to play.
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"There were some teams interested, the one that was most serious was Napoli, but then in the end it didn't work out. But today I'm happy I stayed.
"Fiorentina has shown that they still have faith in me."