Manchester City are discussing a fee of around £30million for Porto midfielder Nico Gonzalez.
Talks continued on Saturday over a deal for the 23-year-old Spain U21 international who has a £50m release clause.
Porto are one of the clubs asking for midfielder Carney Chukwuemeka on loan from Chelsea, along with Borussia Dortmund and Everton.
City midfielder James McAtee is the subject of further interest from Bundesliga clubs looking to sign him permanently for around £25m.
Bayer Leverkusen asked to take him on loan last month with an option to buy for £21m.