Welbeck was rushed to hospital after the match and Emery reckons he has broken his ankle. He's helped us with his behaviour, with his quality and his capacity. And we want to give that on the pitch and try to get the best of what he wants from us on the pitch.
Some of his team-mates were also visibly affected by the incident. But I think the players were concentrated on the match and we forgot this injury the next minute on the pitch. Danny was working well and... But when the match finishes, the first thing they did was ask for him. "They are a big competitive team".
The second half continued in the same vein as the home side attempted to make inroads into the Lisbon backline but Arsenal simply couldn't break down their resolute visitors who had Mathieu sent off late on for cynically hacking down Aubameyang.
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Welbeck collapsed in pain after a collision in the Sporting penalty area 25 minutes into the game at the Emirates and immediately waved for medical attention as he writhed on the ground.
The 27-year-old has been riddled with fitness problems since joining the Gunners from Manchester United for a fee of £16million four years ago.
Arsenal had already beaten Thursday's opponents in this season's tournament, triumphing 1-0 in Portugal last month, and Emery said the draw at the Emirates had demonstrated the significance of securing that prior win in Lisbon.
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Lukaku's injury means he is a doubt for Sunday's trip to Manchester City, so Sanchez might get another outing at the Etihad. He added: "I think it's always good to be the outsider, so people expect bad of us and then we surprise people".
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