With Senegal international Kalidou Koulibaly reportedly available at £65million, here is a look at the current most expensive defenders of all time.
Manchester City are reportedly very keen on the Napoli centre-back as they look to replace the void left by Vincent Kompany at the end of the 2018/2019 season.
Scroll above to see the top 10 most expensive defenders off all time, according to transfermrkt.
While Koulibaly could become City's most expensive defender ever if he joins, that price tag will only see him rank fifth on the top 10 list of most expensive defenders.
The number one spot on that list belongs to England international Harry Maguire, who left Leicester City to join Manchester United last year in a deal reportedly worth €87million.
Dutch defender Matthjis de Ligt held the title of most expensive defender ever for a few weeks as his €85million move to Juventus was confirmed before Maguire's switch before the start of the current season.
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The top three is rounded out by De Ligt's central defensive partner for the Netherlands, Virgil van Dijk.
Van Dijk was the world's most expensive defender in 2018 when he joined Liverpool from Southampton in a deal said to be worth €84.65million.
Following the influx of wealth in the Premier League, it is no surprise to see the top 10 dominated by English teams, with only two non-Premier League transfers cracking the list.