Juventus' Sami Khedira in action against Napoli's Kalidou Koulibaly
According to the Daily Mail, Everton have made an enquiry about Napoli centre back Kalidou Koulibaly, despite interest from Arsenal and Chelsea.
The Toffees have new-found cash to spend this summer following the investment of Farhad Moshiri, but new manager Ronald Koeman has only made one signing so far in veteran goalkeeper Maarten Stekelenburg.
Many positions in the Everton side need some attention from Koeman, but centre back is a particular area of concern. Question marks still hang over John Stones and his future with the Toffees, whilst Phil Jagielka struggled with injuries last season and Ramiro Funes Mori endured an up-and-down first season at Goodison Park.
Koeman may look to spend big on a new centre back, and the Daily Mail claim that Everton have made their first move for Napoli star Kalidou Koulibaly by enquiring about a possible deal.
Koulibaly, 25, has been a star with Napoli ever since his 2014 move from Belgian side Genk, making over 80 appearances for the Serie A side whilst becoming one of the most dominant centre backs in Italian football.
The French-born Senegal international is known for his incredible power, but he's also quick across the ground, confident in possession and strong in the air, meaning he could make the ideal Premier League centre back - just as Virgil van Dijk did with a similar skillset under Koeman at Southampton last season.
The report claims that Arsenal and Chelsea are keen on Koulibaly, but Everton may be ready to outbid their Premier League rivals and make a stunning big-money move to land Koulibaly.
He may not be a household name for many Premier League fans, but Koulibaly would be a huge signal of intent from Everton and new manager Koeman, though it would be interesting to see whether a deal would be alongside Stones or to replace him.
Would you like to see Everton splash out on Koulibaly?