That represents a sharp U-turn from Fiorentina who had been hopeful of their striker signing a new contract.
The club offered Vlahovic a five-year deal worth £34m but he is unwilling to put pen to paper - his representatives have also demanded a £6.6m fee to renew as well as a clause entitling them to 10 per cent of his future transfer fee.
Vlahovic is in the final 18 months of his contract and now Comisso is reportedly willing to cash in while his price tag remains high.
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