Alexis Sanchez's first Arsenal goal secured their spot in the UEFA Champions League group stage as they beat Besiktas 1-0 at the Emirates.
The Chilean forward, who has largely flattered to deceive since making a high-profile move from Barcelona, struck just before half-time in the second leg of Wednesday's play-off.
His effort, backed up by a stellar showing from Jack Wilshere and some dogged defending following Mathieu Debuchy's 76th-minute red card, was enough to see the Premier League side progress to the competition proper for the 17th successive year.
All of the pressure was on Arsene Wenger ahead of an encounter estimated to be worth upwards of £20million for the victors.
But, despite being without Aaron Ramsey following his sending off in a goalless first leg, the Arsenal manager could breathe a sigh of relief.
Besiktas, meanwhile, will have taken great heart from another impressive showing, even if a Europa League campaign now awaits.
Clearly determined to impose themselves, Arsenal began quickly and pressed forward with regularity.
Their approach almost reaped immediate reward, but Wilshere could only drag an effort wide after bursting through from midfield.
Santi Cazorla was the next to threaten, intercepting a dreadful clearance from Tolga Zengin before sending a first-time effort wide with the goalkeeper a long way off his line.
The Premier League side continued to enjoy the lion's share of possession, although Besiktas and, in particular, Demba Ba looked threatening on the counter-attack.
As the half wore on, though, it was the visitors who began to dominate, with Ramon Motta seeing a strong penalty appeal turned down following a wild Wilshere challenge.
The home nerves were finally eased just before half-time, as Nacho Monreal's throughball went through the legs of Wilshere to leave Alexis with the simplest of finishes.
Far from thinking it was a case of 'job done', Arsenal picked up where they had left off after the interval, Cazorla flashing an effort just wide having been picked out by the impressive Alex Oxlade-Chamberlain.
Alexis almost grabbed his second soon afterwards, his poked effort deflecting just wide following a superb Wilshere pass.
The hosts were clearly determined to avoid any late drama but they could not find a cutting edge in front of goal, as Debuchy headed Cazorla's superb set-piece into the side-netting with time running out.
And the tension was taken up another notch when Ba found space in the area and narrowly missed the target at the other end.
With 14 minutes left, Arsenal were hanging on as Cazorla and Oxlade-Chamberlain both missed glorious chances from close range before Debuchy saw red for a second yellow card.
Calum Chambers replaced Mesut Ozil as a result to shore them up at the back, but it needed a late miss from Ba, who failed to meet Gokhan Tore's cross with the goal gaping, before Arsenal could be sure of their spot in Thursday's draw.
|Toronto´s hat-trick hero Giovinco: I´m back|
|Drogba revels in ´special night´, dedicates hat-trick to family|
|MLS Review: Hat-tricks for Drogba and Giovinco as stars shine|
|Whelan backs Liverpool for top-four finish|
|Pellegrini still waiting for right offer|
|Ronaldo deserves to win Ballon d´Or - Vazquez|
|Phelan wants Hull job|
|Alaba saddened by Gotze exit|
|Morgan: Vardy right to re-sign|
|Maradona ´hurting´ as Higuain closes on Juventus move|
|Moyes watches Sunderland win, Ibe opens account in six-goal Bournemouth thriller|
|Messi cuts short holiday for Barcelona training camp|
|Ranieri still confident of keeping Mahrez|
|Toure to complete Celtic move on Sunday, says Rodgers|
|Vietto sends Simeone a reminder amid Barcelona links|
|Celtic 1 Leicester City 1 (5-6 on penalties): Mahrez magic the highlight as Ranieri´s side triumph i|
|Ribery, Alaba on target in Bayern win|
|Neymar hails Micale ahead of Olympic tilt|
|Ronaldo wants Real Madrid renewal|
|Ochoa joins Granada from Malaga|
|Heidel quashes Meyer to Liverpool as ´nonsense´|
|Scholes challenges Allardyce to change England mentality|
|Tenerife star Crosas investigated for killing endangered shark|
|De Gea: Manchester United can win title under Mourinho|
|Marseille replace Batshuayi with brother Leya Iseka|
|Cristiano Ronaldo: Best season of my career|
|Scholes: Pogba is not worth £100million|
|Gotze has not forgotten how to play football - Riedle|
|Delph learning more than ever under Guardiola|
|Jovetic ´not worried´ about Juventus|
|Allardyce wants Euro 2016 woes to fire his England|
|Giggs not in a rush to take manager´s job|
|Lopetegui: If not for Spain I would be Wolves boss|
|Shaw one of best left-backs in world - Herrera|
|Injured Sanchez to miss Arsenal tour|
|Melbourne Victory 1 Juventus 1 (Melbourne win 4-3 on pens): Thomas inspires Victory as Juve pay pena|
|Janssen: Ajax and PSV were never going to pay as much as Tottenham|
|Bayern to make Munich shooting tributes|
|Wenger wishes luck to old foe Allardyce|
|United defender Varela joins Frankfurt on loan|
|Sunderland appoint Moyes as Allardyce replacement|
|Javi Martinez devastated by Munich shootings|
|Rooney: I´m desperate to play for Mourinho, just like under Ferguson|
|Godin: Champions League the dream, but LaLiga the focus|
|Klopp hails Wijnaldum´s ´football smartness´|
|Klavan ready to fight for starting spot after completing ´dream´ Liverpool move|
|Real Salt Lake 1 San Jose Earthquakes 1: Mulholland salvages point|
|Madeira airport to be named after Cristiano Ronaldo|
|Villar, Ceferin and Van Praag announce UEFA presidential bid|
|Witsel has offers from England and Italy|
|Tuchel will bring out Gotze´s best - Watzke|
|Swansea confirm interest in Liverpool´s Allen|
|Arsenal´s Coquelin: LeBron v Curry is like Messi v Ronaldo|
|Rooney backs Allardyce appointment|
|Bayern and Ancelotti respond to Munich attacks|
|West Brom friendly cancelled over violence concerns|
|Allardyce ´cannot stop smiling´ after getting England job|
|Rakitic dismisses Barcelona exit talk|
|Oxlade-Chamberlain salvages draw for Arsenal in opening friendly|
|Bruce leaves Hull City by mutual consent|
|Juventus start Serie A title defence against Fiorentina|
|Guardiola already making impact at Manchester City - Clichy|
|Liverpool sign Netherlands international Wijnaldum|
|Ranieri: Chilwell, Ulloa going nowhere|
|Batshuayi: Conte already making me a better player|
|Allardyce determined to be the best - Davies|
|Wolfsburg sign Mayoral from Real Madrid|
|New coaches the attraction in USA/Europe Champions Cup zone|
|´It was like F1 v F3´ - Mourinho not making hasty judgments on United squad|
|Suarez would welcome Vietto with open arms at Barcelona|
|Glenn hails ´ideal candidate´ Allardyce|
|Juventus begin ICC campaign amid Pogba furore|
|Sunderland look to move forward after Allardyce departure|
|Kuyt backs Wijnaldum for Liverpool success|
|No major trophies, fewer goals than Moyes - the stats behind England boss Allardyce´s career|
|Hayden was wasting his career at Arsenal - Wenger|
|New recruits excite Aubameyang after United rout|
|Allardyce the right man to take England back to basics|
|Solve the Rooney puzzle and restore Sterling´s confidence: Five problems for Allardyce to solve|
|England appoint Allardyce as manager|
|Manchester United 1 Borussia Dortmund 4: Classy BVB hand Mourinho first defeat|
|James vows to stay at Real Madrid|
|Caught in a jam - Minnesota ´explain´ goalkeeper gaffe|
|Clarke nominated for FA chairman|
|Gazidis expects more Leicester-style Premier League triumphs|
|Arsenal snap up Bolton defender|
|Alex the Mann for Liverpool as veteran seals Anfield move|
|Dortmund sign Schurrle on five-year deal|
|Balotelli needs right opportunity - Raiola|
|Lukaku undergoes Lazio medical|
|Suarez: Messi better than Ronaldo by far|
|Allegri remains hopeful of Pogba Juve stay|
|Rakitic´s agent questions Barcelona midfield buys|
|Shearer: England players must respect Allardyce or walk|
|Raiola: I don´t give a damn if Pogba costs a world-record fee|
|Mazinho dreams of Thiago-Rafinha reunion at Barca|
|No heart, no gold says ex-Brazil striker Elber|
|There is space for Mata at United - Mourinho|
|Alonso: Guardiola needs time to improve City|
|Argentina approach Bauza to be coach|
|Inter still ´under construction´ - Ranocchia|
|Mourinho: Rooney will be an important player|
|Ganso prepared for the step up to European football|
|Dyke: Brexit could help England|
|Galatasaray confirm Lucas interest|
|Conte targets Champions League with Chelsea|
|Swansea style attracted new owners Kaplan and Levien|
|Mourinho not concerned if United fail to sign Pogba|
|Mourinho teased Ibrahimovic into United move|