The four players featured are (clockwise from top left) Sadio Mane, Nathaniel Clyne, Dejan Lovren and Adam Lallana. These players have something in common: They are all former Southampton players. Liverpool is basically telling Southampton that it takes all its best players.
That's a solid dig, for sure. But if you're going to shoot, you better not miss. Southampton is spelled with one “h”. There are two in the graphic. “Southhampton” is not a thing.
Liverpool later tweeted out an edited version. Sick burns all around.