Arsenal forward Noni Madueke is attracting interest from Spain and Italy, five Premier League clubs are monitoring Barcelona defender Jules Kounde, while England captain Harry Kane is close to agreeing a new contract with Bayern Munich.
Atletico Madrid and Juventus are targeting 24-year-old Arsenal and England forward Noni Madueke.
Chelsea, Arsenal, Liverpool, Manchester United and Manchester City are all interested in 27-year-old Barcelona and France defender Jules Kounde, with the Spanish club prepared to consider significant offers.
England striker Harry Kane, 33, is in the final stages of agreeing a new three-year contract with Bayern Munich.
AC Milan could make another attempt to sign Manchester United's 25-year-old Dutch forward Joshua Zirkzee in January, potentially on loan with an option to buy.
Arsenal, Liverpool and Borussia Dortmund are interested in Fulham's 19-year-old English attacker Josh King, who is valued at £51m.
Real Madrid are determined to keep 20-year-old Brazil forward Endrick despite interest from Arsenal and Tottenham.
Tottenham's interest in Atletico Madrid striker Julian Alvarez is unlikely to progress, with the 26-year-old Argentine still favouring a move to Barcelona.
Representatives from clubs in the Premier League and Major League Soccer have been scouting 18-year-old Barranquilla midfielder and Colombia Under-20 international Edmilson Herazo.
Liverpool and Manchester United are interested in Barcelona and Spain left-back Alejandro Balde, 22, who is also attracting interest from Juventus.
Paris St-Germain have renewed their interest in 20-year-old Manchester United and France defender Leny Yoro.
Inter Milan and Juventus are both monitoring Liverpool's 19-year-old Italian centre-back Giovanni Leoni.