The Roma center back has suffered a knee strain and is expected to be out for three weeks, Football Italia reports.

This is why depth is important. Astori is a key part of Roma's backline and he will be missed.

The highly regarded central defender has made a surprise move to AS Roma a day after talks broke down in a move to Roma's rival Lazio, Football Italia reports.

Astori was certainly one of the best players Italy did not bring to Brazil this summer. Some felt he belonged on the team. His presence may allow the club to once again consider selling Mehdi Benatia.

The central defender's deal to Napoli has fallen short of being finalized, Football Italia reports.

This is a tough loss for Napoli.

The center back who has drawn interest from many clubs is making the move to Napoli, Football Italia reports.

This is a big signing for Napoli and a big blow for AC Milan, which had hoped to bring the player back after he grew up with the Rossoneri.

Astori is expected to miss three months after suffering a fractured leg after a collision with Napoli's Ezequiel Lavezzi, Football Italia reports.

This is a big loss for Cagliari as Astori has featured for Italy's national team.

Cagliari have bought out AC Milan's 50 percent share of the central defender, Football Italia reports.

A big move by Cagliari as Astori is highly regarded.

Astori and teammate Andrea Lazzari have received their first call to the national team, Football Italia reports.

Astori is a quality player, but will need to show he is deserving of a national team spot.