Alexis Sanchez made his Arsenal debut but it was Yaya Sanogo who stole the show in Saturday's 5-1 Emirates Cup win over Benfica.
The Frenchman - used sparingly by Arsene Wenger last term - scored a first-half hat-trick and added a fourth to his personal haul after the break at the Emirates Stadium as former Barcelona man Alexis made his bow.
Sanogo opened the scoring 26 minutes in against the Portuguese champions when Aaron Ramsey crossed for the Frenchman to backheel into an empty net.
If the half began at a relatively slow pace, the finale was quite the opposite as Joel Campbell - returning from a loan spell at Olympiacos - volleyed home from inside the area after 40 minutes.
Sanogo then wrapped up his hat-trick as first he tapped home Campbell's pass and then nudged an effort past Artur Moraes for the fourth.
The former Auxerre man's lethal finishing continued after the break as he quickly added Arsenal's fifth.
Nico Gaitan pulled one back with a header shortly after the hour but it mattered little, with home fans treated to a convincing showing as well as first glimpses of recent signings Alexis and Calum Chambers.
Arsenal began the brighter and pressed Benfica well, with the returning Campbell among those to catch the eye.
Chambers was deployed in the centre of defence alongside Nacho Monreal and the pair were left watching when Gaitan struck the crossbar from Maxi Pereira's cutback 10 minutes in.
Sanogo was almost able to divert Tomas Rosicky's wayward shot home soon after as Arsenal's front four continued to create openings, albeit initially lacking the required sharpness in front of goal.
Benfica saw recent acquisition Eliseu limp off with 19 minutes gone before Monreal almost steered the ball past Damian Martinez.
However, Sanogo opened the scoring shortly after - Ramsey losing his marker with a clever touch before Sanogo adeptly turned the ball over the line.
With Arsenal in full flow, Campbell volleyed home the second from Rosicky's delivery before Sanogo added two more to send Wenger's men in comfortably ahead.
It took just four minutes of the second half for Sanogo to strike again as he followed up up Ramsey's saved shot to tap home from 10 yards.
Both sides made a host of changes before the hour mark, with Wenger forced to withdraw Campbell, who appeared to pick up a knock.
After the flurry of substitutions, Arsenal were caught cold as Gaitan headed home from Pereira's long throw.
Alexis joined Chambers in making maiden Arsenal appearance to cap a fine day for the home side, who were denied another goal late on as both Ignasi Miquel and Francis Coquelin struck the woodwork.
Arsenal meet Monaco on Sunday, one week before the FA Cup winners' Community Shield clash with Manchester City.
|Rostov comeback twice for Champions League draw with Anderlecht.|
|BREAKING NEWS: Arsenal defender Mertesacker set for lengthy lay-off|
|Conte not selling ´fantastic´ Matic|
|Ibrahimovic keen on MLS and Beckham´s Miami project|
|Neymar: I play for Messi, he´s the man|
|Barcelona reveal details of Andre Gomes deal|
|Suarez bullish over Barcelona prospects|
|Ajax claim Napoli keen on Milik to replace Higuain|
|Totti labels Higuain´s Juventus move ´a disaster´|
|Juventus confirm Higuain deal|
|Pato to Villarreal ´in the final stage´|
|PSG sign Lo Celso|
|Muller: Beating Dortmund will be more fun this season|
|Juventus sign Higuain from Napoli for €90m|
|Pastore: I´m like God in Paris|
|Injured Lanzini out of Olympics|
|Allegri unperturbed by Higuain fee|
|Menezes replaces Bento at Cruzeiro|
|Sporting rejected major bids from Inter and Liverpool for Joao Mario, claims father|
|Pochettino pleased by Tottenham despite Juventus defeat|
|Eriksson: Allardyce the right man for England|
|Mourinho makes United train after stepping off plane from China|
|Hazard can still match Messi, says Pedro|
|Pjanic shows there is life at Juve, with or without Pogba|
|Juventus 2 Tottenham 1: Benatia bags win for Serie A champions|
|Dembele: I am not the Bundesliga´s next superstar|
|Lyon claim €35m Arsenal offer for Lacazette rejected|
|Donnarumma dreaming of Milan captaincy as he eyes long-term stay|
|Robson: Ibrahimovic can match Van Persie´s first year at United|
|Rooney should remain England captain - Eriksson|
|Emery wants new striker at PSG|
|Santos accept Juventus bid for Gabriel|
|Eriksson expects Sweden to try and tempt Ibrahimovic out of retirement|
|Spurs signing Janssen almost quit|
|Leicester stay best for Mahrez - Ranieri|
|Allardyce to take Mourinho cue on Rooney|
|Ings ready to outdo big-money signings|
|Henderson optimistic over Liverpool campaign|
|Allardyce hardened to the challenge of England post|
|Barcelona announce record revenues for 2015-16|
|Moyes enjoys Sunderland win as Palace beat Colchester|
|Stoke complete Allen signing|
|Roma coach Spalletti warns suitors off Manolas|
|Cresswell out for up to four months with knee injury|
|Burnley fan banned by club for racist abuse|
|Dad won´t let me play at the Olympics - Larsson Sr pulls rank|
|Kostic joins Hamburg on five-year deal|
|Tevez: I´d turn down Chelsea and Napoli to stay at Boca|
|Mayoral inspired by Benzema for Wolfsburg stint|
|Allardyce straight into competitive action with England|
|Liverpool, Sevilla fined for Europa League final incidents|
|Barcelona seal Guillemenot signing as part of new Servette deal|
|Niersbach handed one-year ban over World Cup corruption|
|Chelsea and Everton ´still interested´ as Koulibaly eyes Napoli exit|
|´Still working hard´ - Balotelli trains with Liverpool kids|
|Winter breaks, long-ball football and the World Cup: Allardyce in his own words|
|Inter warn Napoli Icardi is not for sale|
|Zanetti wants Simeone back at Inter|
|Stoke snap up Sobhi|
|PSG tougher under Emery - Lucas Moura|
|Totti not ready for retirement - Pallotta|
|Confident Allardyce reveals plan for England success|
|Pochettino to discard three Tottenham players|
|Allardyce: Rooney must wait for captaincy decision|
|Aubameyang: I will only leave Dortmund for Real Madrid|
|Allegri silences questions on Pogba|
|Bruce stands by decision to quit Hull City|
|Pochettino: Not the right time for Argentina job|
|Inter yet to approach De Boer with Mancini exit rumoured|
|Ancelotti trusts me more than Guardiola - Ribery|
|Wijnaldum rejected Everton for Klopp|
|Pre-season Manchester derby cancelled|
|Coutinho excited by ´fast´ Liverpool recruits|
|Cristiano Ronaldo and Conor McGregor step into the ring together|
|Mancini coy on reports linking Icardi to Napoli|
|Nolito reveals why he chose Man City over Barcelona|
|Inter 1 Paris Saint-Germain 3: Icardi absence in defeat fuels Napoli talk|
|MLS Review: Wright-Phillips double inspires Red Bulls to New York derby rout|
|James seeks more game time at Madrid|
|Rooney: I want to be a manager|
|Mignolet welcomes Karius challenge in Liverpool number one battle|
|Batshuayi buoyed by winning vibes at Chelsea|
|Moyes and Sunderland players diverted after plane fault|
|´Loved´ Varane targets long Madrid stay|
|Kostic set for Hamburg medical|
|Leicester crying over Kante sale - Ranieri|
|Schurrle the perfect Mkhitaryan replacement - Tuchel|
|West Ham face anxious wait on Cresswell injury|
|Mourinho will accept criticism from United legends|
|Bertolacci desperate for fresh start after underwhelming first season at Milan|
|Hoops hand Toure one-year deal|
|Origi ready to fight for Liverpool spot|
|Emery wants PSG stay for ´fantastic´ Matuidi|
|No Barcelona offer for Vietto - Cerezo|
|Burnley apologise for racist abuse from supporter|
|Guardiola will not rush Kompany comeback|
|Of course I´ll shake Guardiola´s hand, snaps riled Mourinho|
|Watzke: No more signings for Dortmund|
|Roma expect Manolas to snub Premier League move|
|Adriano set to leave Barcelona for Besiktas|
|Manchester United in worst possible situation - Mourinho|
|Sporting would have to sell stadium to afford Van Persie - Jesus|
|Jonas´ agent confirms Barcelona approach|
|No problem with Mourinho, insists Guardiola ahead of derby in China|
|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|