The side drawn first will play the first leg at home April 26, with the return leg scheduled for May 3.
It is Diego Simeone's Atletico, though, who Wenger would prefer to avoid in his side's first last-four tie in Europe since 2009.
"Not that the league is not competitive, but football continues to evolve, things are changing and when we don't adapt to the changes, then we will surely lag behind, the North Africans are far ahead and whenever we meet them in the CAF competitions, we are always scared". With Salzburg leading 2-1, the 22-year-old South Korean scored a goal in the 74th with his right footed strike following a pass by Duje Caleta-Car.
"We will see the draw, but we need more confidence in our game", the French defender said. The Champions League qualification that comes with it is a lucrative silver lining worth celebrating.
"I can say that, until 75 minutes of the match, we played extremely well and we were winning in a very justified way", he said.
"So, let's prepare well for the semi-final and see who we play".
Gunners supporters sing songs and show their colours at a pub in the Russian capital
'There is a big responsibility for everyone because we know with the position we are in the league'.
Arsene Wenger was without Granit Xhaka and Henrikh Mkhitaryan at the CSKA Moscow vs Arsenal match in Moscow so Mohamed Elneny and Welbeck came in as the two changes to the team that won the first leg 4-1.
However, Atletico held on to progress on aggregate after their striker Antoine Griezmann missed a hatful of chances and will take their place in Friday's semi-final draw. Arsenal have embarked upon a seven-game unbeaten run since losing four straight games.
"That is something that is really exceptional that you do not find in many players".
The relief among the Arsenal players was palpable as Alexandre Lacazette and Hector Bellerin smothered Welbeck with more success than their companions had smothered the CSKA forays forward. After, we had some pressure on us because, if they'd scored the third, we're out.
Arsenal (ENG), Atletico Madrid (ESP), Lazio (ITA), Leipzig (GER), Marseille (FRA), Salzburg (AUT), Sporting Lisbon (POR).More news: Trump puts off decision on Syria strike