Mikel Arteta faces one huge selection headache ahead of Arsenal's trip to Southampton. Many of the Gunners players have made themselves 'undroppable' this season with the team in scintillating form, but there is one dilemma.
Who starts at left-back? It does not appear as though Oleksandr Zinchenko will be fit as he continues to recover from his calf problem, leaving Kieran Tierney and Takehiro Tomiyasu to battle it out for the spot on the left side of the defence.
Tomiyasu is not naturally a left-back, but has been given the nod in the position since he pocketed Mohammed Salah in Arsenal's 3-2 win over Liverpool at the start of the month. It's harsh on Tierney, who started at left-back against PSV Eindhoven in midweek, with Tomiyasu shifting over to the right.