Napoli and Fulham have set their sights on signing the Scotland international.
And Il Corriere dello Sport says Napoli have made a major move for McTominay.
Contract terms have now been struck between McTominay and the Azzurri, which were hammered 3-0 by Hellas Verona in yesterday's Serie A opener.
Fulham, meanwhile, have tabled an improved offer for the midfielder over the weekend.