Manchester City and Real Madrid are planning moves to steal Marquinhos away from Paris Saint-Germain, after the Brazilian's contract talks with the French club broke down.
The 25-year-old signed for PSG in July 2013 and since then has gone to become a key player for the French champions, making over 250 appearances and winning a host of domestic honours.
The centre-back, who has also been deployed as a defensive midfielder in recent seasons, is currently contracted at the club until summer 2022 with the Parisians keen to extend his stay beyond this.
However, le10sport are reporting that talks between the two parties have reached an impasse, specifically over Marquinhos' wages. PSG are said to want to add two more years to the player's current deal, but this disagreement could open the door for the former Roma man to depart the club in the upcoming winter transfer window.
City are in dire need of a centre-back after a serious injury to Aymeric Laporte has left them short-staffed in that position this season.
Guardiola's side have already conceded 19 goals this season, despite letting in just 23 in the entirety of the previous campaign.
The Citizens have also been linked with a move for Leicester centre-back Caglar Soyuncu in January, though the Foxes are currently in contract talks with the Turkish international, making this move unlikely.
Nathan Ake is another player touted for a move to the Etihad Stadium but City will face stiff competition from Chelsea in the race for the defender's signature.