The first legs will take place on April 24-25 and the second will be on May 1-2.
He set up Danny Welbeck for a precious goal against CSKA in the 75 minute with a deft through pass to kill off the hosts' hopes of overcoming a 4-1 first-leg deficit.
Asked about the significance of the competition and his manager's future, which appears to be intrinsically linked with the Europa League, Lacazette replied: "It will save our season because in the Premier League we are not doing well".
Meanwhile, Friday's draw in Nyon saw Olympique Marseille handed a clash with Red Bull Salzburg in the tournament's other last-four pairing.
For example Arsenal only arrived back in London at 5am on Friday after their Europa League quarter-final against CSKA Moscow in Russian Federation and will only have 48 hours to prepare for their next league fixture away to Newcastle on Sunday.
Commonwealth Games: England men & women reach rugby sevens semis
As we move closer to the 2020 Tokyo Olympics, it's inevitable that the look of Canada's women's sevens team will evolve. The men maintained their unbeaten run and eliminated Australia to set up a match against New Zealand on Sunday.
The Europa League final will be in Lyon, France on Wednesday, 16 May, with the victor guaranteed a place in next season's Champions League.
"You look at [Manchester] City and they look a bit like that in the second half of games recently".
Marseille would love to make it to a final being played on French soil after making it through to a first European semi since 2004. Prior to that, Arsenal swept aside AC Milan 5-1 over two legs.
The Liverpool-Roma tie pits Mohamed Salah, who has scored 39 goals in all competitions already this season, against his former club. The teams also drew 0-0 at the Velodrome in the group stage.
Wenger signed a fresh two-year contract at the end of last season after leading the club to FA Cup glory and Lacazette reckons a successful finish to their Europa League campaign will be enough to keep the embattled Frenchman another season.