The Gunners need to overturn a 3-1 deficit from the first leg in France, if they seek to progress to the next round.
Arsenal head coach Unai Emery insists winning the Europa League is more than just qualifying for the Champions League as he targets a trophy during his first season in charge. Not sure what else to say.
"We are going to think the same before every match".
After scoring Aubameyang donned a Black Panther mask to celebrate, and he explained why afterwards.
"I needed the mask to represent me", Aubameyang said to BT Sport after his sixth brace of the season in all competitions.
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Speaking about his attempted celebration against United, he said: 'I had a special celebration planned but I couldn't find my mask.
"It's a Black Panther and in Africa, in Gabon we call the national team the panthers of Gabon".
Rennes made it a disjointed game after the break as they looked to battle their way back into the match but it was Arsenal who got the third goal when Sead Kolasinac found Aubameyang with a superb cross and the striker tapped home for 3-0 in the 72nd minute.
Ainsley Maitland-Niles doubled the lead when the former Borussia Dortmund ace floated in a ideal ball for the Arsenal academy graduate.
"Then he made a challenge on (Ramy) Bensebaini which was also borderline, but the decision didn't go our way".