Welbeck has endured a number of serious injuries during his career and it remains to be seen how long his latest setback will leave him on the sidelines.
The 27-year-old required oxygen after falling badly on his ankle in the 25th minute.
However, they have not lost since, are fifth in the Premier League, have won all three of their Europa League games and are into the quarter-finals of the Carabao Cup.
Meanwhile, Carl Jenkinson and Emile Smith Rowe get another opportunity to impress.
"I think Danny was working well and was playing a good match".
Alex Iwobi also failed to hit the target with a decent chance as Sporting's interim coach Tiago Fernandes turned to prolific forward Bas Dost from the bench in the hopes of leaving north London with three points.
"This could be a break of something in the ankle", stated Emery.More news: Democrats signal they want to investigate Jeff Sessions' ouster and replacement
Record five-time winners Sevilla needed a late penalty from Ever Banega to claim a 3-2 victory at Akhisar Belediyespor, after having a man sent off, losing a two-goal lead and seeing the Turks miss a spot-kick of their own.
It was the hosts that took the game to their opponents, and they were lucky to still be on level terms before half-time.
However, the former Manchester United striker - dubbed by the Portuguese sportspages the "Welbeck Express" such was his all-round powerful display in Lisbon 14 days previously - suffered what looked to be a serious injury in the 25th minute.
"When we have the ball, we're all offensive players".
Arsenal's players, most notably Guendouzi, were clearly moved by seeing their team-mate in pain and the half did not really flow again.
Former Arsenal defender Martin Keown says Pierre-Emerick Aubameyang let the Gunners down during Thursday's goalless draw against Sporting CP in the Europa League.