Leeds United's Charlie Taylor
With first-choice left back Aaron Cresswell ruled out with a long-term knee injury, and Stephen Hendrie out on loan at Blackburn, manager Slaven Bilic has no recognised left back in his squad.
Norwich's Martin Olsson with manager Alex Neil
Right back Sam Byram has been filling in there of late, but a natural left footer is needed – and the Hammers are being linked with a host of possible targets.
Now, The Mirror report that, with pursuits of Martin Olsson and Ludwig Augustinsson hitting a brick wall, West Ham could turn their attention back to Leeds star Charlie Taylor, a former team-mate of Byram.
Portugal's Joao Mario and Sweden's Ludwig Augustinsson in action
Taylor, 22, has come up through the ranks at Elland Road – just as Byram did – and has become a star for Leeds ever since taking the left back spot following Stephen Warnock's move to Derby in January 2015.
Now one of the Championship's top young stars, Taylor is catching the eye of Premier League clubs, and given that he has just one year left on his contract, many teams will be eyeing up moves to sign him this summer.
Leeds United's Charlie Taylor in action with Brentford's Maxime Colin
However, Leeds confirmed earlier this week that they have rejected a transfer request from Taylor, as chairman Massimo Cellino and manager Garry Monk agreed not to sell the player, which would make West Ham's pursuit of him even more complicated.
With deals for Swedish international duo Olsson and Augustinsson, of Norwich and Copenhagen respectively, allegedly proving difficult to complete, West Ham are believed to be looking into a deal for Taylor – but may find that he's just as difficult to sign.
Would you like to see West Ham sign Taylor?