Arsenal are set to face Manchester City in a crucial title clash on Sunday, and there are several decisions Mikel Arteta needs to make. One key decision will be in midfield. Thomas Partey has recently returned from a long-term injury, and has stated his desire to help his team, but Jorginho has been in excellent form, whilst the Ghanaian is still some way off from full match fitness. Partey looked rusty when he made his return against Sheffield United, and despite featuring in a behind-closed-doors friendly, has perhaps not had enough match practice to warrant a start at the Etihad Stadium. Ar…