Unai Emery's side go into today's clash at St Mary's looking to extend their unbeaten run in all competitions to 23 games but Sead Kolasinac not in squad.
Arsenal confirm Sead Kolasinac will misses today's match due to tightness in his thigh
Emery forced into defensive shuffle. Koscielny is in for his first PL start of the season and Lichtsteiner lines up at CB. Kolasinac is replaced by Monreal at left-back.
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