Brentford have made an official approach to Italian side Bologna for 20-year-old Scotland defender Aaron Hickey, who is also attracting interest from Napoli, Arsenal, Newcastle and Aston Villa.

Arsenal and Newcastle United's hopes of signing Napoli midfielder Fabian Ruiz have been given a boost after he turned down a new contract offer made by the Serie A club.

Arsenal have held talks over a move for Napoli and Nigeria striker Victor Osimhen, 23, and are also continuing their attempts to land Brazil forward Gabriel Jesus, 25, from Manchester City.

Barcelona are interested in signing Napoli centre-back Kalidou Koulibaly, 30, and will try to lower the Italian club's 30-35m euro (£25.5m-£29.7m) asking price by offering Bosnia midfielder Miralem Pjanic, 32, as part of any deal.

Manchester United and Newcastle United are interested in signing Nigeria striker Victor Osimhen but Napoli want at least 100m euros (£85.5m) for the 23-year-old.