Midfielder Simone Padoin signed for Serie A leaders Juventus in a 5 million euro (US$6.5 million) move from Atalanta BC on Tuesday.
The 27-year-old has signed a five-year deal. Juventus will also have to fork out an extra 1 million euros if they qualify for the Champions League this season.
Meanwhile, Inter moved to offset the departure of midfielders Sulley Muntari and Thiago Motta with a triple-signing on transfer-deadline day on Tuesday.
Colombian forward Freddy Guarin, Italy midfielder Angelo Palombo and Brazilian defender Juan have all joined.
Guarin, 25, joins from Portuguese champions Porto on a four-and-a-half year deal.
Palombo, who was part of the Italy squad at the 2010 World Cup, spent the last six months in Serie B after refusing to leave relegated Sampdoria.
The 30-year-old has now joined the Nerazzurri on loan until the end of the season, with an option to a permanent three-year deal at that juncture.
The 20-year-old Juan, not to be confused with his compatriot and namesake at AS Roma, has signed from Internacional until June 2016. He can play at either centerback or leftback.
AC Milan have signed young Brazilian forward Lucas Roggia, according to Internacional president Giovanni Luigi.
The 21-year-old, who was out of favor at the Porto Alegre-based club, has joined for a year with the view to gaining European experience before returning.
The Italian champions also raided Swiss lower-league team Chiasso to bring back Nigerian forward Kingsley Umunegbu, who had only left in the summer.
Chievo Verona have signed centerback Dario Dainelli, who has come under fire from fans recently, on loan from Genoa until the end of the season.
Former Italy forward Vincenzo Iaquinta has left the Old Lady of Turin to join Cesena on loan until the end of the season.
Michele Pazienza has returned to Udinese on loan from Juventus, having failed to secure a regular place in the Serie A leaders team since moving from Napoli in the summer.
Cesena have let Algerian forward Abdelkader Ghezzal leave on loan for Spaniards Levante UD, with Argentine Mario Santana joining on a similar deal from Napoli.
SS Lazio and Cesena have undertaken a midfield swap with Antonio Candreva moving to the Italian capital and Simone Del Nero heading in the other direction.
Argentine goalkeeper Juan Pablo Carrizo has moved to Catania on loan from Lazio, with an option to making the move permanent at the end of the season.
Catania brought in two more players on loan — Chilean midfielder Felipe Seymour from Genoa and Torino’s Nigerian striker Osarimen Ebagua.