Inter Milan and Barcelona are targeting Chelsea and Argentina midfielder Enzo Fernandez, 23, whose future at Stamford Bridge appears increasingly uncertain.
Arsenal have set their sights on Newcastle forward Alexander Isak, 25, as a primary transfer target, though the Magpies are likely to demand around £100m for the Swedish international.
Manchester United are interested in Sporting winger Geovany Quenda, 17, a Portugal Under-21 international also being monitored by Manchester City, Liverpool, and Juventus.
Recently sacked Manchester United manager Erik ten Hag had opposed the signing of Dutch forward Joshua Zirkzee from Bologna this summer and was reportedly frustrated when the £36.5m signing showed up to training significantly overweight.
Tottenham are eyeing Netherlands midfielder Tijjani Reijnders, 26, but are doubtful they can lure him away from AC Milan in the January window.
Chelsea are unwilling to entertain offers for defender Benoit Badiashile, 23, viewing the French center-back as a key part of their long-term plans.
Bayern Munich are weighing up a move for Eintracht Frankfurt forward Omar Marmoush, with Liverpool also expressing interest in the 25-year-old Egypt international.
Nottingham Forest are hoping to secure a loan deal for Bayern Munich winger Mathys Tel, 19, but the French Under-21 star has no plans to leave Bavaria this winter.
Former Chelsea and Everton boss Frank Lampard has emerged as a surprising contender to replace Roma manager Ivan Juric if the club decides to part ways with the Croatian coach.
Tottenham are preparing to activate a one-year extension option for South Korean forward Son Heung-min, 32.
Manchester United will give new head coach Ruben Amorim input on contract extensions for players nearing the end of their current deals.
Aston Villa are close to finalizing a lucrative new contract for English forward Morgan Rogers, 22.
Edu is set to join the network of clubs owned by Nottingham Forest’s Evangelos Marinakis after stepping down from his role as Arsenal’s sporting director.
Arsenal manager Mikel Arteta will play a pivotal role in selecting a replacement for Edu as sporting director.