His second opportunity saw the England worldwide head straight at Renan Ribeiro, but the striker landed badly on his ankle and left the field on a stretcher.
"He has been taking to the hospital".
Welbeck helped the Gunners win the 2017 FA Cup and subsequent Community Shield.
"We do not even know what I'll be doing tomorrow".
The Arsenal forward attempted to get back up but was unable to do so on his own, prompting Arsenal medics to rush to his aid.
Le risque de blocage rend amère la victoire démocrate — États-Unis
Sans surprise, les républicains gardent la majorité au Sénat, alors que les démocrates remportent la Chambre des représentants. D'autres départs pourraient suivre alors que Donald Trump veut peaufiner son équipe en vue de la présidentielle de 2020.
Arsenal have revealed they are unable to deliver a comprehensive update on Welbeck's injury until Monday.
That was the last of the meaningful action as Arsenal failed to score for just the second time under Emery - but it will be Welbeck's injury that dominates the fall-out.
"Danny remains in hospital and will continue to be assessed".
One even went as far to say that he had been their worst ever signing.
Speaking after the final whistle, the Arsenal boss said: "I think Danny was working well". His injury also affected the mentality of the players as they could see it was a big injury.
La hausse des prix du carburant provoque un front anti-Macron — France
Les pistes avancées par l'exécutif ont suscité l'incompréhension au sein de l'opposition, mais aussi chez les élus régionaux. Macron , vous n'êtes pas le bienvenu ici.
"It's very challenging mentally, but sometimes it comes in the game and there's been a lot of injuries, and unfortunately for Danny he's had a few so we're going to wish him the best", he stated.
Welbeck has suffered from long-term injury problems since joining Arsenal from Manchester United in 2014 and has spent lengthy periods on the sidelines. "He can come back strong".
"We have to give credit to Sporting because they were very compact and they made it hard for us, but maybe that composure was lacking a bit today", he added.
The two played together at Arsenal.
VIDÉO - Un journaliste virtuel, dopé à l'intelligence artificielle, présente son premier JT
Un programme de machine learning est à la manœuvre pour la synthèse vocale, les expressions faciales et les mouvements des lèvres. S'il a l'avantage de pouvoir travailler sans interruption, ce présentateur est encore perfectible comparé à un humain.