One Arsenal star hugely impressed Mikel Arteta and his coaching staff in training throughout the international break. Mikel Arteta will need to lean on the full depth of his Arsenal squad between now and the end of the season. The Gunners are still pushing for glory in both the Premier League and the Champions League. Every game between now and the end of the campaign will carry huge importance, but as the fixtures will also come thick and fast, Arteta cannot simply rely upon his preferred starting XI to get the job done week in, week out. The Spanish coach has a strong squad at his disposal a…