Celtic have cashed in on a significant number of players over recent years, some of whom have made moves to English clubs. The likes of Kieran Tierney, Odsonne Edouard and Kristoffer Ajer, among others, have all joined Premier League clubs in recent years and seen the Hoops pick up hefty sums in terms of transfer fees.
One other player who waved goodbye to Parkhead to join a team south of the border is Virgil van Dijk. After making 115 appearances for the Bhoys across all competitions, in which he found the net 15 times and delivered seven assists in addition to winning two Premiership titles and one Scottish League Cup, the defender was sold to Southampton in 2015 for a fee of £13m.
Now that several years have passed since the Dutchman left Glasgow, the current transfer window could give Hoops boss Ange Postecoglou the chance to unearth what could be his own version of Van Dijk.
Last month, it was reported that Celtic were in talks with German club Schalke 04 over a potential swoop for their young centre-back Malick Thiaw.