Arsenal have been left to sweat over the condition of Danny Welbeck after the striker was stretchered off in their clash with Sporting CP.

Welbeck was handed a rare chance to impress by Unai Emery as the Gunners looked to continue their strong run of form in the Europa League group stages on Thursday night.

However, after a spell of on-field treatment in the opening exchanges of the match, Welbeck was forced off in the 29th minute with what appeared to be a serious-looking injury.

Welbeck was stretchered off the Emirates pitch with an oxygen mask utilised, with the forward understood to have sustained a serious injury when challenging for a header.

Pierre-Emerick Aubameyang replaced the England international, whose current condition is not yet known following the injury.