Manchester City would have to part with £90 million to secure Harry Maguire from Leicester City, according to reports.
The Blues are thought to be in the market for a new centre-back after club captain Vincent Kompany announced that he will become player-manager at RSC Anderlecht next season.
Doubts remain over the future of Nicolás Otamendi at the Etihad after a shortage of starts during City's treble-winning campaign.
And Goal claim that Leicester would demand a world-record fee for a defender for City to claim their prised asset, after Maguire impressed during his second season at the King Power Stadium.
Meanwhile, Eliaquim Mangala is said to have arrived in Portugal ahead of a proposed return to former club Porto.
The centre-back, who didn't play a game for City last season, signed on at City in a deal with £27 million in 2016 but struggled for form and fitness after injuring knee ligaments on loan at Everton in 2018.
Portuguese outlet O Jogo claim that a deal has been agreed between the player and club, but the agreement is said to be dependent on the 28-year-old France international passing a vigorous medical after his fitness struggles.
Elsewhere, City are set to lose out to Manchester United in the race for Bruno Fernandes, according to reports in Portugal.
Both Manchester clubs have been linked with a move for the midfielder, who scored 32 goals in 53 appearances for Sporting Lisbon last season.
A Bola claim that United are confident of a deal, which could be completed 'within the next week'.
