When it comes to centre-backs, Tottenham manager Antonio Conte has been a good judge of them in his managerial career. The Italian is a defensive expert and has a good record of improving players and making them watertight.
It's also one of the areas that most fascinates him in the transfer market. Looking for new recruitments to shore up or transform a backline, Chelsea fans have seen it at Stamford Bridge already. During his first full summer, the infamous 2018 window, his targets included Virgil van Dijk, Allison Becker and Romelu Lukaku.
Also on that list was Kalidou Koulibaly, a largely unknown defender to Premier League viewers at the time. Conte was strung up on securing his signature for the upcoming season. Things might have been quite different if he had.