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.
|BREAKING NEWS: Whelan and Crouch sign new Stoke deals|
|Mutch joins Palace from QPR|
|Eriksen delighted by League Cup double|
|Real Madrid v Real Sociedad: Moyes´ men out for rare Real double|
|Nolan impressed by Carroll attitude|
|Wenger: Gabriel will adapt to English football|
|Destro says yes to Milan move|
|Allardyce not expecting Sakho ban|
|Ribery sidelined for three Bayern Munich matches|
|Cahill refuses to rule out retirement after Asian Cup final|
|Pogba to leave Juve by end of next season - Agent|
|Martinez not planning Eto´o replacement|
|Blatter formally submits bid to remain FIFA president|
|Puncheon predicts ´great times´ for Palace|
|Donadoni has no plans to leave Parma and criticises Cassano|
|Mangala: My first season at City could have been better|
|UAE v Iraq: Rare podium finish on offer|
|Ryan spurred on by Australia´s 2011 heartbreak|
|Montella will not sell Cuadrado cheap|
|Mali, Guinea furious with tie-breaking procedure|
|Luis Enrique defends Neymar´s behaviour|
|Gabi: Referee lacked personality|
|Chile 3 USA 2: Gonzalez´s brace extends Americans´ pain|
|Franjic cleared of serious injury|
|Our progression was deserved - Pochettino|
|Ivory Coast´s tournament starts now - Renard|
|Allegri rejects Juve criticism|
|Atletico´s Arda Turan escapes red card after throwing boot at assistant referee|
|Atletico Madrid 2 Barcelona 3 (agg 2-4): Neymar double secures semi-final spot|
|Parma 0 Juventus 1: Morata late show wins it for visitors|
|Sheffield United 2 Tottenham 2 (agg 2-3): Pochettino books Wembley final|
|Ecuador dismiss Vizuete|
|Championship Preview: Middlesbrough out to continue run, Bournemouth seek response|
|Guinea 1 Mali 1: Lots to decide Group D runners-up|
|Cameroon 0 Ivory Coast 1: Gradel strike sends Renard´s men through|
|Lots to be drawn to decide AFCON qualifiers|
|Eredivisie Preview: De Boer warning for Ajax, leaders PSV host Willem II|
|Bundesliga Preview: Leaders Bayern and Wolfsburg kick off Ruckrunde|
|Howard boost for Everton|
|Ligue 1 Preview: Jardim plays down Monaco title hopes ahead of Lyon showdown|
|Costa charged by FA for alleged Can stamp|
|O´Keefe joins Cardiff|
|Dons teenager Alli in demand|
|Gabriel seals Arsenal switch|
|Wolfsburg v Bayern Munich: Guardiola eyes ´big step´ to Bundesliga title|
|Paris Saint-Germain v Rennes: Montanier seeks another upset in French capital|
|Martinez rules out panic buys|
|Gilardino targets Fiorentina goals|
|Milan agree Bocchetti loan|
|League Two Preview: Cambridge and Luton prepare to renew rivalries|
|Ronaldo hit with two-match ban|
|West Brom complete McManaman deal|
|Sullivan hits back in Sakho row|
|Richards: Cuadrado suited to Premier League|
|Figo to challenge for FIFA presidency|
|Inzaghi out to freshen up struggling Milan|
|Wigan agree a fee for Mckay|
|Carver eyes strong finish|
|Bowen cools talk of Stoke swoop for Sandro and Traore|
|Lazio-bound Morrison lands in Rome|
|Mourinho fined £25k for ´campaign´ claims|
|Mainz bring in Castillo|
|Villa: Lambert will not be sacked|
|Monk hopeful of adding new faces|
|Sainsbury ready to replace Franjic|
|Beckenbauer hopeful of Guardiola stay|
|Mourinho hits back at Costa critics|
|Rodriguez grateful for ´fundamental´ Ronaldo support|
|La Liga Preview: Real want revenge against Socieded|
|No Dallas move for Essien|
|Bale rubbishes United link, Ronaldo rift|
|Sahin in ´good shape´ for Bundesliga resumption|
|Rodgers slams Costa´s stamp collection|
|Under-fire Inzaghi urges patience|
|Rodgers: Courtois saved Chelsea|
|Mashaba wants lessons to be learnt after AFCON exit|
|Mourinho refuses to wade into Costa incidents after Chelsea win|
|Football League Review: Bent double sends Derby second, Rotherham triumph|
|Chelsea 1 Liverpool 0 (aet, agg 2-1): Ivanovic settles action-packed League Cup semi-final|
|Milan 0 Lazio 1: Inzaghi future plunged into further doubt|
|Neymar dreaming of ending Brazil´s home hoodoo|
|South Africa 1 Ghana 2: Late Ayew winner seals qualification|
|Senegal 0 Algeria 2: Mahrez and Bentaleb dump Senegal out|
|Bocchetti poised to join Milan on loan|
|De Rossi suffers calf injury|
|Montano accuses Oldham of double standards after Evans saga|
|Bojan out for the season with ruptured cruciate|
|Cameroon v Ivory Coast: Renard defends Yaya Toure|
|Yanga-Mbiwa makes Roma move permanent|
|Guinea v Mali: Quarter-final berth on offer in Mongomo|
|Thohir: Inter not reliant on European football|
|Bremen land Vestergaard|
|Allegri refuses to rule out Cassano move|
|Mexes handed four-game ban after Lazio dismissal|
|Joyce reveals Valdes´ inspirational team-talk|
|CAF announces AFCON venue switches|
|Alcacer commits future to Valencia|
|Postecoglou calls for Aussie ´energy´|
|Everton confirm Eto´o departure to Sampdoria|
|Pochettino to stick with Vorm despite cup error|
|Barcelona are not favourites against Atletico, says Luis Enrique|
|Allegri wary of Parma backlash in Coppa Italia|
|Zidane urges Real to tie Ancelotti down|
|FIFPro: Transfer system failing football|
|Anderlecht condemn Standard´s Defour banner|
|Australia 2 UAE 0: Socceroos ease into home final|
|Barca overhaul youth system|
|FIFPro demands clubs respect contractual obligations|
|Mahmoud targeting World Cup place with Iraq|
|Fabregas wants Chelsea to show winning mentality|
|Rangers borrow £10m from Ashley´s Sports Direct|
|Lyon face anxious wait over Lacazette|
|Undermanned Lazio recall Perea|
|Ki wants South Korea to prove their superiority|
|Ghana´s Gyan wary of South Africa|
|Mashaba urges South Africa to attack|
|Benitez: Napoli deserved to win|
|Pacos de Ferreira 1 Benfica 0: Leaders fail from the spot|
|Serie A Review: Higuain at the double in controversial Napoli win, Udinese see off Empoli|