The Hammers look set for a busy summer of transfer activity, with one area they may need to address being right-back.
Carl Jenkinson is currently on loan at Upton Park from Arsenal, but whether or not he will be kept permanently remains up in the air.
And in case they cannot lure the full-back from the Gunners, West Ham are watching Fox.
The 21-year-old has impressed for the Championship side this season, playing frequently for Guy Luzon’s side.
His performances are believes to have attracted the attention of the east London club, who have put the Addicks’ youngster near the top of the transfer window hit-list.
The Wales U-21 international is also wanted by Aston Villa and Newcastle and has two years to run on his contract at The Valley.