It is increasingly unlikely that Vlahovic will extend his contract with the Viola and should therefore be on the move this summer.
According to the Corriere dello Sport and Tuttomercatoweb, Atletico Madrid surged ahead of Tottenham Hotspur in the race by bidding €70m plus bonuses, very close to the €80m asking price.
TMW insist another discussion is expected with the Spanish club later today by telephone, setting a deadline of Thursday for a response.
If the 21-year-old does leave, then Sassuolo striker Scamacca has been mentioned as the first-choice replacement.
It therefore rang alarm bells this afternoon when agent Alessandro Lucci was spotted arriving at the Fiorentina headquarters, as Scamacca is among his clients.
Lucci also represents Chelsea full-back Zappacosta, who is their primary candidate should Pol Lirola finally complete his transfer to Olympique Marseille for €12m.
The fee has been agreed for some time, but the clubs continue to discuss the payment schedule and precise details of the deal.
Zappacosta has also been linked with a move to Atalanta.