Fulham are interested in signing one defender from west London rivals Chelsea this month. Trevoh Chalobah is a player Fulham want on loan, according to the Daily Mail. However, the same outlet has claimed that Chelsea would also be willing to sell the centre-back to help them raise funds to sign a left-back. The left side of defence has been a bit of an issue for Mauricio Pochettino this season. Ben Chilwell and Marc Cucurella have both had injury problems — the latter is still sidelined — and Ian Maatsen has just joined Borussia Dortmund for the rest of the campaign. At present, Levi Colwill,…