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Arsenal are keen to beat north London rivals Tottenham to the signing of teenage striker Breel Embolo, who is valued at £21 million by Basel.
Real Madrid president Florentino Perez is a fan of Arsenal's Alexis Sanchez and could make a mega-bid in the coming months.
Real Madrid are keeping tabs on Roma's Miralem Pjanic ahead of a January bid, though Barcelona are also monitoring the situation.
Juventus are desperate for a new midfielder, with Borussia Dortmund's Ilkay Gundogan top of their shortlist.
Chelsea are pursuing Shaktar Donestk attacking midfielder Alex Teixeira, who is valued at £30 million. The Blues were named by the Brazilian as one of three clubs chasing him on Friday.
Manchester City defender Martin Demichelis looks set to leave the club in January. The centre-back has become a periphery player at the Premier League club and a return to his native Argentina or a move to MLS club New York City FC are possible.
Bayern Munich are refusing to lose Pep Guardiola without a fight. Manchester City are believed to be chasing the coach as Manuel Pellegrini's replacement in 2016, but the Bavarians are determined to keep him.
Manchester City will offer £28.1 million to sign with Juventus left-back Alex Sandro. The Brazilian player impressed the Citizens in the last Champions League matchday.