Sunderland may already have a potentially key signing in their sights, with loan star Chris Mepham continuing to impress. Chris Mepham joined Sunderland on loan from Bournemouth during the summer transfer window. The Welsh international was brought in as defensive cover following the injury to Aji Alese, with Mepham having also stepped in during Dan Ballard’s injury absence. Mepham, 26, has now started the last five league games for Regis Le Bris’ side, who claimed a 1-0 win against Hull City last time out. Mepham was influential in the win. After the game, Sunderland boss Le Bris praised Meph…