Both the London clubs have been linked with the Azzurri ace in recent times, with rumours having suggested that January offers are being considered.
But now the 23-year-old looks set to put pen to paper on a new deal to keep him in Naples.
The fresh contract is likely to run until 2019 and could include a significant release clause.
Although not signed yet, it’s likely that the agreement will be confirmed when the club’s owner, Aurelio De Laurentiis, returns from a trip to America.
The news will be a massive blow for both Arsenal and Spurs, whom were both thought to be chasing him. The Gunners were linked with a £17m move over the summer, while their local rivals have been watching the situation closely.
Insigne travelled to the World Cup earlier this year on the back of a fine 2013/14 campaign in Serie A.
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