The Saints lost loan star Toby Alderweireld to Tottenham earlier this summer, and whilst manager Ronald Koeman swooped to sign QPR defender Steven Caulker on a season-long loan deal, the injury to Florin Gardos means that Southampton still need another centre back.
Now, The Mirror believe that Southampton are confident of signing Celtic hero Virgil van Dijk - and are using goalkeeper Fraser Forster to help them.
The England international is currently out injured, but could help the Saints land Van Dijk, with the report suggesting that the shot stopper is talking to Van Dijk in a bid to sell a move to St. Mary's Stadium to his former team-mate.
Forster played alongside the 24-year-old during the 2013/14 season before his own move to Southampton, and he is now working to try and secure a reunion, with another former Celtic star Victor Wanyama also involved according to The Mirror.
Celtic would hate to lose Van Dijk now, with their Champions League qualifier against Malmo around the corner, but they must know that eventually, the Dutchman is bound for the Premier League.
A move to Southampton, where he can learn alongside a veteran like Jose Fonte, would be ideal for Van Dijk, who is athletically and technically gifted, but may need coaching up in other areas.
With Forster looking to persuade Van Dijk to make the move to Southampton, it seems that Koeman is desperate to sign his compatriot this summer - and with money to spend, they may well be favourites to sign the Celtic star.