West Ham is planning some unexpected late moves to bring in a fantastic player maker as they try to improve their midfield options before the 11 p.m. deadline.
He has not yet appeared throughout this campaign.
According to 90min, the Serbian himself is willing to leave the former Serie A and UEFA Champions League champions.
This season, West Ham, a sizable and reputable Premier League team, will compete in the UEFA Europa League.
The £55,000 per week (SalarySport) star may be interested in a transfer to the Hammers.
In Serie A for Juventus last year, Kostic made 33 starts and four substitute appearances.
In those games, the Serbian star provided eight assists in addition to three goals.