Barcelona sporting director Deco says the club won't be able to find a replacement to match the level of quality of Gavi in the January transfer window.
Barcelona are looking to sign a midfielder to cover for the absence of injury-stricken Gavi.
Miralem Pjanic, the 33-year-old Bosnian midfielder, is nearing the end of his playing career with Sharjah in the UAE Pro League.
In Sunday's Euro 2024 qualifier against Georgia, 19-year-old Spanish sensation Gavi sustained a serious knee injury.
Ansu Fati's potential return to Barcelona next summer is facing uncertainty due to financial constraints.
Barcelona midfielder Ilkay Gundogan made headlines when he left Manchester City to lead the charge for the Blaugrana under Xavi Hernandez.