Manchester City could reportedly move for RB Leipzig centre-back Dayot Upamecano in January.
The 21-year-old, who has made 11 appearances for his German club this season, is believed to be a transfer target for both Arsenal and Tottenham Hotspur.
The report claims that City's issues in central defence could force them into the January market, with Upamecano being considered as a target ahead of the winter window.
The France Under-21 international, who missed the second half of the 2018-19 campaign with a knee injury, will reportedly see the release clause in his current deal drop to £53m ahead of next season.
Fernandinho and John Stones are currently operating as the two centre-backs in City's defence with Aymeric Laporte on the sidelines and inspirational captain Vincent Kompany leaving ahead of the new campaign.
Nicolas Otamendi is another option for Guardiola, but the Argentina international has been out of favour in recent weeks following some questionable performances.