Aston Villa could offer Endrick a route to the Premier League, Bournemouth are determined to keep Alex Scott, while several European heavyweights are monitoring Rayan Cherki.
Aston Villa are prepared to pursue a loan move for Brazil forward Endrick after the 20-year-old struggled to impress Real Madrid manager Jose Mourinho.
Paris Saint-Germain and Liverpool are interested in signing Manchester City midfielder Rayan Cherki should the 23-year-old France international become available.
Ajax defender Aaron Bouwman, 19, is among a number of promising young players being monitored by Newcastle United ahead of the next two transfer windows.
Arsenal have emerged as serious contenders for Club Tijuana attacking midfielder Gilberto Mora, with the highly rated 17-year-old Mexican attracting significant interest.
Bournemouth have no intention of selling England midfielder Alex Scott, 23, in January despite interest from Chelsea and Real Madrid.
Real Madrid have reportedly scouted Scott on at least three occasions, while Liverpool, Arsenal and AC Milan are also keeping tabs on the Bournemouth midfielder.
Germany defender Antonio Rudiger, 33, appears set to leave Real Madrid at the end of the season, with the Spanish club currently having no plans to offer him a new contract.
Tottenham are expected to prioritise signing a striker during the January transfer window, although the club are unlikely to commit to a major financial outlay.
Real Madrid and Barcelona are prepared to offer Manchester United attacking midfielder JJ Gabriel, 15, a lucrative package including a substantial salary, bonuses and a signing-on fee.
Bayern Munich remain interested in Gabriel but are unwilling to meet the seven-figure salary reportedly being demanded by the Manchester United youngster's representatives.
Bayern Munich are also monitoring Newcastle United goalkeeper Nick Pope, with the 34-year-old's contract due to expire next summer.
