Spalletti was spotted in Italy this week, fuelling reports he is set to replace Sinisa Mihajlovic at the Stadio Artemio Franchi.
"I am in Florence for other reasons linked with a publicity tour and not for talks with Fiorentina," he insisted.
"I am happy at Zenit and will not be leaving Russia. As for Fiorentina, Mihajlovic is a good Coach and I take this opportunity to urge everyone to leave him to get on with his work.
"After all, he has had to face quite a few problems this season."