The 2-2 result sees the north Londoners progress to the semi-finals courtesy of a 6-3 aggregate scoreline, along with Atletico Madrid, Marseille and Salzburg.
Meanwhile, Atletico held on in the rain in Lisbon to win 2-1 on aggregate against Sporting, despite losing on the night to a Fredy Montero header in the first half.
Lazio, who are third in Serie A, led 4-2 from the first leg in Rome and increased their advantage when Ciro Immobile scored his eighth goal in this season's competition in the 55th minute but Salzburg equalised a minute later through Munas Dabbur.
"They were very focused and played well as they attempted to score", Elneny said following the game, which saw him provide the two assists of Arsenal's two goals.
CWG 2018: 13 African Athletes Go Missing From Gold Coast
"Both athletes were removed from the Games Village", the Commonwealth Games Federation President Louise Martin said. In 2012, seven Cameroonian athletes disappeared in the same condition while in London for the Olympics.
Bromley council chiefs quizzed over gender pay gap
Professional, scientific and technical; education; and mining and quarrying also emerged as some of the most unequal industries. Apple, Nike, and Starbucks, along with Wells Fargo and JP Morgan, earned an A-, which was the highest grade.
Teen killed in minivan was trapped under third-row seat, official says
The teen's parents then used an app to track his cellphone and called police, reporting that their son was missing, police said. The Hamilton County coroner has ruled Kyle Plush's death an accidental asphyxia due to chest compression.
'Maybe we were a bit surprised by the intensity of the game and we were not at the races in the first half.
"It was not the plan", said the France defender. "We always believed in it, and that makes a lot of difference".
However, just as CSKA threatened again, they were stunned by a brilliant piece of play from Welbeck.
"It is our last chance to qualify for the Champions League, so we will fight until the end".
Wenger's charges had to survive a scare to reach the last-four, however.
"You could see when you have a big difference after the first game it's hard to turn up with the same urgency than if a difference is very small and that played a part in the way we played in the first half", said Wenger.