Among all of the issues Mikel Arteta is contending with at Arsenal right now, he won’t certainly won’t want unhappy players in his squad. Arsenal have now endured three defeats on the spin, ending their chances of winning the FA Cup and severely damaging their title hopes. That being said, fans are now increasingly keen for their side to see the January transfer window as an opportunity to improve. Goals are now proving a real issue, and last night Mikel Arteta turned to Reiss Nelson as a starter instead of Gabriel Martinelli. Nelson impressed in his minutes, even if he tailed off in the secon…