The Saints captain has been impressive since moving to St Mary's Stadium in 2016 but his contract runs out in less than two years' time.
Mario Gotze has seemingly turned down a move to Liverpool, but they should target his Bayern teammate instead.
Leeds United striker Jean-Kevin Augustin is yet to make his debut since arriving at Elland Road.
Tottenham Hotspur, Arsenal and West Ham United all want Liverpool midfielder Adam Lallana.
Tottenham Hotspur's Luis Binks has linked up for the time being with a former Arsenal striker.
Tottenham Hotspur's Jan Vertonghen is said to have interest, but are Liverpool among his suitors?
Tottenham Hotspur recently loaned Danny Rose to Newcastle United.
Few rival Premier League players would get in Jurgen Klopp's squad these days - but Southampton's Danny Ings might be one of the few.
Jose Mourinho's Tottenham Hotspur side beat Southampton 3-2 in the FA Cup yesterday, with Ryan Sessegnon's display catching the eye.
Jurgen Klopp's Liverpool side are currently sat at the top of the Premier League table.
Eunan O'Kane is one of several senior Leeds United players currently out on loan.
Tottenham Hotspur paid £27m to bring Steven Bergwijn to the Premier League and Jose Mourinho already loves Davy Propper's former PSV team-mate.