Arsenal manager Unai Emery claims that the club's main focus is lifting the Europa League trophy at the end of the season, insisting that the added benefit of Champions League qualification is an afterthought.
Five minutes into the second half, Alexandre Lacazette put the Gunners 5-2 up on aggregate, before Gameiro gave the Spaniards hope of yet another dramatic European comeback.
Arsenal won the first leg of their Europa League semi-final against Valencia 3-1, but everyone knew the second leg away from home would be far tougher.
In turn, Lacazette praised his teammate Aubameyang, saying after the match: "We reacted well to going behind and we knew we had to score a minimum of one goal tonight".
"The Europa League is a trophy and we are playing in it to win it", Emery said, quoted by ESPN.
Cech has had to deal with playing second fiddle to Bernd Leno in Unai Emery's Premier League side and has been used exclusively in cup competitions since September. With Barcelona and Ajax having provided an object lesson in how not to defuse a semi-final, Arsenal instead played to their strengths.
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He told BT Sport: "We have played badly in the Premier League during the last month and now we have to use this opportunity". Manchester United won it. Sevilla played the final with Liverpool.
"It's beyond doubt that we'll have a better chance if Mestalla supports us from the start". I am proud of them, how they worked defensively.
"I think Emery, even if he loses the final, has seen a good improvement in Arsenal".
At times, Sarri's first year in England has been a stressful one for both the man himself and the Chelsea supporters who have seen some performances unworthy of a top-four place.
The Blues will face their London rivals - who defeated Valencia earlier on Thursday - in the final in Baku on May 29.