Arsenal are in a mess ahead of Brighton as injuries, suspension and contract issues bite

David Luiz had a calamitous outing at Manchester City on Wednesday after coming on as a first-half substitute after Pablo Mari was injured. Luiz was at fault for Raheem Sterling's opener.

The defender, who is out of contract at the end of this month, then hauled down Riyad Mahrez to give away a penalty and was sent off. He will be suspended for Arsenal's visit to Brighton.