Manchester United are targeting Lewis Hall and Adrien Truffert, Real Madrid remain interested in Riccardo Calafiori, while Liverpool and Arsenal are both monitoring Barcelona youngster Xavi Espart.
Manchester United are planning a significant defensive overhaul next summer and are expected to renew their pursuit of Newcastle United and England left-back Lewis Hall, 22, who is reportedly keen on a move to Old Trafford. Bournemouth and France defender Adrien Truffert, 24, is also on United's shortlist.
Real Madrid remain interested in signing Italy international Riccardo Calafiori, but Arsenal have made it clear that only an exceptional offer would persuade them to part ways with the 24-year-old defender.
Liverpool and Arsenal are both monitoring Spanish defender Xavi Espart, 19. However, Barcelona are determined to retain the highly rated youngster and would reject approaches for a player whose release clause exceeds £84m.
Newcastle United are considering a move for AC Milan and England defender Fikayo Tomori, with the 28-year-old potentially available on a free transfer when his contract expires next summer.
Arsenal are reportedly preparing a January move for Club Brugge striker Nicolo Tresoldi, 22, with the German forward valued at approximately £42m.
Argentina midfielder Emiliano Buendia is closing in on a new contract with Aston Villa, while negotiations over fresh deals for Sweden defender Victor Lindelof, 32, and English youngster George Hemmings, 19, are also progressing.
Manchester United continue to monitor Crystal Palace winger Ismaila Sarr, 28, although the Red Devils could face competition from Galatasaray, who remain interested in the Senegal international.
Tottenham Hotspur and Spain right-back Pedro Porro, 27, would reportedly give serious consideration to a move to either Barcelona or Real Madrid should an opportunity arise.
Argentina international Lisandro Martinez, 28, is reportedly set to leave Manchester United at the end of the season, potentially becoming another departure in the club's planned defensive restructuring.
