Inter have pulled off a major coup by beating Bologna to goalkeeper Emiliano Viviano in the Serie A co-ownership blind bidding, according to Goal.com Italy.
The blind auction also saw Gaetano D'Agostino return to Udinese with young Swedish midfielder Albin Ekdal re-joining Juventus.
The deadline for resolving co-ownership deals was Friday evening with clubs placing their bid into a sealed envelope with the highest bidder winning the signature of the player.
Viviano's move to Inter is the highest-profile switch, yet the transfer was due to an astounding error made by Bologna director general Stefano Pedrelli who accidentally put the wrong bid on the paperwork.
The mistake has resulted in the Italian international joining the Coppa Italia winners with the club paying €4.1 million (£3.6m) for the remaining 50 per cent of Viviano's contract.
In another blow for Bologna, Juventus beat their bid for Swedish youngster Albin Ekdal, which will see the 21-year-old return to Stadio Olimpico di Torino for the upcoming campaign.
Another eye-catching transfer will see Gaetano D'Agostino return to Udinese The club who finished in fourth place in Serie A last season beat Fiorentina to the midfielder's signature.
Daniele Mannini returns to Napoli after time spent with Sampdoria, while Genoa have full ownership of Fernando Forestieri, beating Udinese to the attacker's services.
In other deals, Daniele Cacia is now a Lecce player, who beat Piacenza while Chievo saw off Torino to reclaim Antimo Iunco.
Youngster Gianni Munari joins Palermo after an impressive season at Lecce while Simone Pesce transfers to Ascoli who beat Catania to full ownership and Riccardo Meggiorini joins Genoa after a spell with Bologna.