Atalanta are demanding at least €12m to part with German left-back Robin Gosens, as Schalke 04, Napoli and Milan are interested.
The Orobici qualified for the Champions League and finished third in Serie A, as well as reaching the Coppa Italia Final, putting many of their players in the international spotlight.
According to La Gazzetta dello Sport, Schalke 04 are the most determined side for Gosens, ahead of Napoli and Milan.
The Germans are believed to have already had one offer turned down, because Atalanta are asking for €12m.
In turn, Schalke aim to turn his head by more than doubling his current €400,000 salary to €1m per year.
Gosens scored three goals and provided two assists in 36 competitive games for Atalanta last season.
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