As Hakan Calhanoglu becomes the latest, we look at five big names who have alternated between Inter Milan and AC Milan.
The 37-year-old made his country's dreams come true at the final stage of his career before bowing out with utmost grace and class.
Mourinho was signed by Italian club Roma just 15 days after being sacked by Premier League club Tottenham Hotspur.
The 28-year-old Inter Milan striker continued his hot streak with a double in Euro 2020 opener, reminding Europe of his scoring prowess.
Eriksen is Denmark's most active capped player with 108 caps as well as the team's top goalscorer with 36 goals.
After helping the club win its first Serie A title in over a decade, the 51-year-old left the Italian giants in a shocking move.
Inzaghi recently left his role as Lazio manager after five years with Le Aquile, where he reportedly turned down a contract extension.
The appointment comes one week after Napoli terminated the services of Genarro Gattuso after an underwhelming season.
Simone Inzaghi joined Lazio in 1999 as a player and won one Serie A and three Coppa Italia titles before retiring in 2010.
In a surprising move, Inter Milan coach Antonio Conte left the newly-crowned Serie A champion by "mutual consent" on Wednesday.