Cancela was injured during the training of the Portuguese national team and left the team's location.
The player returned to Italy, where he underwent a preliminary medical examination.
According to the Portuguese edition of EFE, the player has been found to have damaged knee ligaments, because of what he can miss two months.
Also, the publication notes that in connection with the injury, Canselo Inter blocked the transfer of Christian Ansaldi to Genoa.
Cansela only last week joined the ranks of Inter, moving from Valencia on loan with the option of redemption at the end of the season.