Arsenal manager Mikel Arteta said it will be difficult to find January signings that will be capable of immediately improving his side as they aim to end a five-year trophy drought. A lack of firepower was exposed in the past week as Arteta's men lost 2-0 to Newcastle in the League Cup semi-final first leg and drew 1-1 at Brighton in a blow to their Premier League title hopes. Adding to Arteta's attacking problems, Arsenal winger Bukayo Saka is set to be sidelined until at least March after surgery on a hamstring injury. The Gunners lie six points adrift of Premier League leaders Liverpool, who have a game in hand, although they are well-placed to progress to the Champions League knockout stages.