William Saliba-shaped hole grows ever larger for Mikel Arteta after 3-2 defeat by Borussia Dortmund - but Viktor Gyokeres and Kai Havertz are proving they CAN play together, writes ISAAN KHAN

ISAAN KHAN: The absence of William Saliba due to a back injury is problematic for the Gunners, highlighted further after this pre-season friendly against Borussia Dortmund.