Inter would win Serie A with Chelsea midfielder N'Golo Kante and Napoli defender Kalidou Koulibaly, according to Massimo Moratti.
Antonio Conte guided Inter to a second-place finish last season, with Juventus securing their ninth successive Scudetto by just a single point.
The Nerazzurri are aiming to build on that platform by dethroning their arch-rivals in 2020-21, but haven't made the flying start to the season supporters might have hoped for.
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Inter are sitting seventh in the Italian top flight after seven fixtures, five points behind leaders AC Milan and one adrift of reigning champions Juve.