The only formula that Inter may use this January transfer window is the famous loan with option to buy. And according to the Corriere dello Sport, if they use this formula to sign Joachim Andersen in January, it can be done.
“President Ferrero resisted Inter when it came to Torreira, Bereszynski and Praet but now he could be convinced to do a deal in the middle of the season. One eye on the future, the other on the budget, the objective of Ausilio and Marotta is to cover the hole (potentially) left behind by Joao Miranda. Andersen has always started for Sampdoria this season, except for the last game against Juventus due to suspension.”