Southampton and Liverpool have formed a unique relationship over the years, but it is not one that the all fans are particularly happy with.The Reds have bought a number of Saints stars that have become regular first-team members of the team.Adam Lallana, Dejan Lovren, Nathaniel Clyne, Sadio Mane and Virgil van Dijk have been among the exodus from St Mary's.Southampton have pocketed some decent cash from the sales, but as a result have lost some key players, particularly more recently when Van Dijk jumped ship in January to move to Anfield.[ad_pod ]Now, the rumour mill has been churning out reports suggesting that one of the Saints' former stars intends to leave Liverpool.According to France Football, Mane has agreed personal terms with Real Madrid regarding a summer move, but a fee between both clubs is yet to be agreed.The publication claims, though, that a transfer has been put on hold due to the recent departure of Zinedine Zidane as manager.Losing Mane would be a huge blow to Liverpool given that he was a key figure in the prolific attack including Mohamed Salah and Roberto Firmino.Some Southampton fans, though, would rather enjoy seeing Liverpool lose out this time around.