Martin Zubminendi thinks the backing of the home faithful at Emirates Stadium will ensure Arsenal reach the Champions League final.
Arsenal head into Tuesday's clash on the back of a 1-1 draw in the first leg in Madrid last week.
The Gunners, who are embroiled in a tight title tussle with Manchester City in the Premier League, beat Fulham 3-0 at home on Saturday to move six points clear at the top of the table.
And Zubimendi is confident the "incredible" Emirates atmosphere can get Arsenal over the line.
"Playing at the Emirates on a European night is different. I think that even in the days leading up to it, you can feel the atmosphere building," said the Spaniard in an interview with Arsenal's official website.
"Once you get to the stadium, the atmosphere is incredible. You can really sense that desire to win this Champions League that everyone wants so much, so I think that the semi-final [second leg] is going to be incredible."
Arsenal were on course for a potential quadruple earlier in the campaign, but they lost the EFL Cup final to Man City before crashing out of the FA Cup against Southampton.
A wobble in the league allowed Man City to close in, but Zubimendi sees no reason to be distressed.
"The season has been all about consistency; every match counts," he added.
"It doesn't matter to us where we're playing or who we're facing. I'm happy about that because we've been really focused for every match and that's not been easy.
"I think Arsenal have gone from strength to strength in this competition in the last few years, quarter-finals, semi-finals last year. So it's clear that we're making good progress and there's no reason [for that to stop]."
PLAYERS TO WATCH
Arsenal – Viktor Gyokeres
Gyokeres, who scored in the first leg, could become just the third player to score in both legs of a Champions League semi-final for a Premier League team, after Sadio Mane for Liverpool (2021-22 v Villarreal and 2017-18 v Roma) and Riyad Mahrez for Man City (2020-21 v Paris Saint-Germain).
Frimmy was all of us in this moment pic.twitter.com/405MUmF694
— Arsenal (@Arsenal) May 4, 2026
Atletico Madrid – Antoine Griezmann
Griezmann could make his 128th and final appearance in major European competition (currently on 127); the fourth-most ever by a French player, only behind Karim Benzema (152), Thierry Henry (135) and Claude Makelele (130).
He is also one of only four Frenchmen with 50+ goals in major European competition (50), along with Benzema (90), Kylian Mbappe (78) and Henry (58).
MATCH PREDICTION: ARSENAL WIN
Julian Alvarez has averaged a goal or assist every 80 minutes in his Champions League career (34 in 2,710 minutes – 25 goals, nine assists). Of strikers with 20+ goal involvements in the competition, only Erling Haaland (74) has a better ratio.
So, Arsenal's defence will certainly have to be at its best to keep Alvaraz, Griezmann and Co. under lock and key, but Opta's supercomputer is backing Mikel Arteta's team to progress.
Arsenal have only lost two of their last 23 matches in the Champions League (W17 D4), while both of those defeats came against reigning champions PSG (both legs of last season's semi-finals).
The Gunners are yet to lose a game in the current edition (P13 W10 D3), and could go 14 consecutive matches without defeat for the first time in their European Cup/Champions League history.
Atletico could reach the final of the Champions League for the third time under Diego Simeone (previously in 2014 and 2016). Only two coaches have ever reached more finals in the competition with the same club: Alex Ferguson with Manchester United and Marcello Lippi with Juventus (four each).
Arsenal are looking to reach their first Champions League final since 2006 – should they do so, it will be the longest period between European Cup/Champions League finals by a team in the competition since Atletico in 2014 (40 years), and longest by an English side since Liverpool in 2005 (20 years).
Atletico have lost six of their last seven away games against English sides in the Champions League (W1), including each of the last four in a row. Their defeat at the Emirates Stadium earlier this season (0-4 in October 2025) remains their joint-heaviest loss in the European Cup/Champions League (along with five other defeats by four goals).
OPTA WIN PROBABILITY
Arsenal – 56%
Draw – 23.7%
Atletico Madrid – 20.3%