William Saliba was substituted at half-time during Arsenal's Premier League match against Crystal Palace, with Cristhian Mosquera taking his place on the pitch. The reason behind Mikel Arteta's tactical switch remains a mystery for now, sparking new injury worries within the Arsenal squad. The Gunners entered Sunday afternoon's game without several key players.

Martin Odegaard and Kai Havertz were sidelined due to knee injury recovery, while Noni Madueke and Gabriel Jesus were also ruled out due to long-term injuries. The captain's replacement in the side, Eberechi Eze, had already given the hosts the lead with his first league goal - against his former club.

The Gunners had a golden chance to extend their lead at the top of the table, given Liverpool had already been defeated 3-2 by Brentford on Saturday. Manchester City had gone a goal down away to Aston Villa at the same time as Arsenal's match with Palace.

It was Saliba's defensive partner, Gabriel, who entered the London derby as a doubt due to injury. Mikel Arteta claimed that the Brazilian had missed training after suffering a knock in the midweek victory over Atletico Madrid.

Neither he...