The 20-year-old flew to Naples on Monday to undergo a medical, before completing his move to the Serie A side.
Chalobah has yet to make any first team appearance for Chelsea, but Jose Mourinho wants him to gain more valuable experience.
The 20-year-old joined Chelsea at the age of 10 from Fulham. He started featuring regularly for Chelsea reserves and youth sides, and led the Chelsea side that won the FA Youth Cup in 2012.
We have a picture of Chalobah wearing the Napoli shirt courtesy Carefree youth
— CarefreeYouth (@CarefreeYouth) August 31, 2015
Also take a look at some of the twitter reactions:
Nathaniel @Chalobah has passed his Napoli medical ahead of a loan move. Good luck!
— Chelsea HQ (@Chelsea_HQ) August 31, 2015
Good luck to Nathaniel Chalobah at Napoli, whose new manager Maurizio Sarri said of his arrival: “I don’t know anything about the player.”
— Matthew Stanger (@MatthewStanger) August 30, 2015
— Chelsea Youth (@chelseayouth) August 31, 2015