The Gunners qualified for the knockout stages of the Europa League with after a 0-0 draw against their Portuguese rivals, before Emery confirmed the club's worst fears as he revealed Welbeck suffered an injury that will keep him out of action for a lengthy period.
The 27-year-old took on oxygen as he was tended to on the pitch for several minutes before he was stretchered off, with some of Welbeck's team-mates were left visibly distraught by his plight. "They are a big competitive team".
"We worked well with very good commitment in a hard game".
"He tells you exactly what he wants you to do, but gives you freedom to expose your talent". "The news is that we are going to wait - but we think it's a serious injury". He's helped us with his behaviour, with his quality and his capacity. We wish him all the best in his recovery.More news: Ariana Grande Stumbles, Laughs While Performing ‘Thank U, Next’ on ‘Ellen’
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A heavily changed Arsenal side were unable to break down a dogged Sporting team, who were reduced to 10 men in the 88th minute when defender Jeremy Mathieu fouled striker Pierre-Emerick Aubameyang as he raced towards the area. I should point out that he played a series of nice passes, clipping them out wide to the full backs and wingers.
The incident seemed to affect both sets of players for the rest of the game, with little in the way of goalscoring opportunities. "We will know [more] about his injury tomorrow".
Arsenal's 1-1 draw with Liverpool on Saturday extended the Gunners' unbeaten run to 14 games, but Emery says his side need wins against the Premier League's top sides to be considered genuine title contenders.