Liverpool and Real Madrid are the two front-runners in the pursuit of AC Milan winger Rafael Leao, who is valued at €150m (£130m).
Borussia Dortmund are looking for buyers for 18-year-old striker Youssoufa Moukoko. Contact has been made with Barcelona, Chelsea, Liverpool, Juventus and Real Madrid with a view to a €35m (£30m) sale.
Of those suitors, Chelsea are readying a bid worth £26m to sign Moukoko in January.
Manchester United are prepared to sell Jadon Sancho in January and will accept a huge loss on the £73m they paid to sign him from Dortmund.
Barcelona are already aware of how much it would cost to sign both Joao Felix and Joao Cancelo permanently. Atletico Madrid will demand €80m (£69m) for Felix, while Cancelo's asking price has been set at €25m (£22m) by Manchester City.
Having been moved to right-back this season, Thomas Partey is unimpressed with his role at Arsenal and is prepared to push for a January. Juventus are expected to pursue a deal.
Bayern Munich are prepared to compete with Real Madrid for the signing of Chelsea right-back Reece James next summer.
Paris Saint-Germain could look to pursue a swap deal which would send goalkeeper Gianluigi Donnarumma to AC Milan in exchange for France international Mike Maignan.
After learning of interest from Manchester City during the summer, Crystal Palace are preparing to open contract talks with midfielder Ebere Eze.
Hugo Lloris is expected to leave Tottenham Hotspur on a free transfer in January after failing to find his desired move away during the summer.
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