Bradley is being linked with AS Roma.
"At an official level with [Chievo President Luca] Campedelli we took a few days of reflection," Sartori told Radio Mana Mana Sport.
"But with Bradley he has important offers from top teams in our Division and at the top level in foreign championships from England and Germany.
"My feeling? Probably we will part ways in this summer's transfer market. We've already found his replacement."