Napoli face competition from Everton and Manchester United for Lille defender Gabriel, having already signed Victor Osimhen from the French side.
According to RMC Sport chief Mohamed Bouhafsi, Manchester United representatives met with Gabriel’s agents in England this week.
There is believed to be no firm offer yet, but negotiations have begun to understand the general situation.
Everton and Napoli remain the favourites, with a fourth club also reportedly showing interest, rumoured to be Liverpool.
The 22-year-old Brazilian centre-back only recently extended his contract with Lille to June 2023.
He is believed to have an asking price of €20-25m, although some player exchanges would be accepted.
Napoli have the upper hand, having just completed their deal with Lille for striker Osimhen.