Real Madrid are interested in Bayer Leverkusen defender Jarell Quansah, Liverpool are monitoring Club Tijuana teenager Gilberto Mora, and Roma remain keen on Real Madrid striker Endrick.
Real Madrid are showing interest in Bayer Leverkusen's 23-year-old England defender Jarell Quansah, who attracted a bid from Arsenal during the summer and was also the subject of an enquiry from Chelsea.
Mexico teenage star Gilberto Mora, 17, is on Liverpool's radar, although Borussia Dortmund and Benfica are also interested in the Club Tijuana midfielder.
Spain and Barcelona midfielder Dani Olmo, 28, has expressed a desire to finish his career with Dinamo Zagreb.
Canada forward Jonathan David, 26, is beginning to convince Atletico Madrid to turn his loan from Juventus into a permanent £21m transfer.
Inter Milan are interested in Italy midfielder Alessandro Romano and could make a move for the 20-year-old, who is currently on loan at Cagliari from Roma, if Turkey international Hakan Calhanoglu, 32, leaves when his contract expires next summer.
Roma missed out on a loan move for Real Madrid striker Endrick, 20, during the summer but remain interested in signing the Brazil international in January.
Barcelona made an enquiry about Croatia defender Josko Gvardiol last season, but it became clear that the 24-year-old had no intention of leaving Manchester City.
Barcelona and Inter Milan are monitoring Stuttgart defender Finn Jeltsch, with the 20-year-old German also attracting interest from Premier League clubs.
Bologna have agreed a deal to sign former Manchester United defender Matteo Darmian, 36, on a free transfer after the Italian left Inter Milan at the end of last season.
