Napoli signs Alberto Grassi from Atalanta until 2020

Napoli completed its first acquisition of the January transfer window Wednesday with the arrival of Alberto Grassi from Atalanta.

The club confirmed the move after agreeing to a transfer fee with its Serie A rival to secure the 20-year-old midfielder's services.

"Napoli would like to announce that Alberto Grassi has joined the club on a permanent contract that expires in June 2020," the club said.

Although Grassi's arrival isn't expected to have a major impact in the club's fortunes, the defensive midfielder will provide depth for a Napoli outfit attempting to maintain top spot in the Serie A table.

The Italian side currently holds a two-point edge on defending Serie A champions Juventus with 47 points through 21 contests.