Manchester City have reportedly joined Premier League rivals Liverpool and Manchester United in the race for Napoli defender Kalidou Koulibaly.
The Senegalese centre-back has been regularly linked with United in the past and Liverpool are rumoured to have recently opened talks ahead of the summer transfer window.
According to journalist Duncan Castles, Koulibaly is also now wanted by Man City as Pep Guardiola attempts to plug the gap left by Vincent Kompany's departure last year.
Speaking on the Transfer Window Podcast, Castles claimed that the reigning Premier League champions are prepared to spend big to see off competition for the 28-year-old.
Koulibaly has also been touted as a target for Paris Saint-Germain and is believed to be valued in the region of £90m.
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