By Kieran Gill for the Daily Mail
Published: 22:31 BST, 26 May 2019 | Updated: 22:40 BST, 26 May 2019
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Arsenal's defence must not shoot themselves in the foot in the Europa League final against Chelsea after an error-prone season in the Premier League, according to Shkodran Mustafi.
The Gunners' defending was calamitous at times in 2018-19 and Mustafi, one of the culprits, insists it was merely down to teething problems under new manager Unai Emery.
The statistics show how no Premier League club made more errors leading to shots or goals than Arsenal as they attempted to get to grips with Emery's system.
Shkodran Mustafi has told his fellow defenders to stay focused against Chelsea on Wednesday
Now, Mustafi says he and his team-mates are determined not to let it cost them their chance of Champions League qualification when they face Chelsea on Wednesday night.
'It's going to be a game where one mistake punishes you and that's why we've got to be very careful,' Mustafi said ahead of their showdown at Baku's Olympic Stadium.
'Our job as defenders is to try not to concede goals, but if you make 90 per cent of your job and in the 10 per cent the opponent scores a goal, people forget about the 90 per cent.
'If in the end of the season you made 70 points, it is for a reason. If you go into the game without the defence and only with attacking players, I am not sure you are going to make 70 points.
'At the end of the day, even when we try to play
