Theo Walcott believes Gabriel Martinelli’s one-on-one miss in Saturday’s 2-0 defeat to Bournemouth could prove extremely costly for Arsenal.
The Gunners travelled to the South Coast unbeaten in all competitions this season, just one point adrift of early Premier League leaders Liverpool.
However, William Saliba was sent off after just 30 minutes, leaving Mikel Arteta’s men with a mountain to climb at the Vitality Stadium — especially without injured trio Bukayo Saka, Martin Odegaard and Jurrien Timber.