Gabriel Martinelli scored two goals and set up another as a youthful Arsenal side turned on the style to thrash Standard Liege 4-0 in their Europa League Group F meeting at the Emirates Stadium
Teenager Martinelli, a £6m signing from Brazilian side Ituano during the summer, opened the scoring with a superb header after 13 minutes and netted his second with a low, curling finish just three minutes later, making it four goals from two games following his double against Nottingham Forest in the Carabao Cup
Joe Willock hit Arsenal's third with another curling finish (22) before Dani Ceballos completed the scoring in the second half when he poked a Martinelli cross over the line for his first goal for the club (57)
Unai Emery's side missed a series of chances to extend their lead in the closing stages, but the victory is another significant step towards the Europa League knockout stages following the 3-0 win over Eintracht Frankfurt in their opening group game
Arsenal were dominant right from the start, pushing the visitors back and directing most of their attacks down their left flank, where Kieran Tierney, making only his second appearance for the club following his £25m arrival from Celtic, produced a string of dangerous crosses
It was from one such cross that Martinelli scored the opener, darting across his marker at the near post and glancing a superb header high into the net after Shkodran Mustafi's cross-field pass had found its way to Tierney
Arsenal's next two goals came from the same area
 For their second, Martinelli beat Standard Liege defender Zinho Vanheusden to a Reiss Nelson cut-back and controlled the ball smartly before shifting it onto his right foot and curling a low finish beyond the goalkeeper
Willock volleyed another Tierney cross over the bar from close range soon after that, but the academy graduate did not have to wait long to add Arsenal's third, controlling Nelson's deflected shot and dispatching a composed finish into the corner for his third goal of the campaign
Arsenal were unfortunate not to be awarded a penalty when Standard Liege goalkeeper Vanja Milinkovic-Savic brought down Nelson shortly before half-time, but they were celebrating their fourth just 12 minutes after the break when Martinelli's delicate centre was forced home by Ceballos
Arsenal threatened more goals after that, with Martinelli going close to a hat-trick on a couple of occasions and Emery also sending on Nicolas Pepe and Pierre-Emerick Aubameyang from the bench, but the visitors, who offered almost nothing going forward, just about held out
Martinelli's brilliant start to life at Arsenal continues
 The Brazilian was not expected to feature prominently this season having only turned 18 in June, but this outstanding performance might just tempt Emery into using him in the Premier League too
His goals were expertly taken and his assist for Arsenal's fourth was arguably even better, as he latched onto an Ainsley Maitland-Niles through-ball and dug out a delightful cross from the byline which would have dropped over the line even without Ceballos' intervention
Martinelli was a constant threat and Emery will be just as encouraged by the defensive side of his performance
 The teenager was full of running, forcing Standard Liege defenders into mistakes on the ball and setting the tone for an energetic Arsenal performance
Arsenal manager : "To have six points after the two matches, it's really important
 We can take confidence
 We were consistent over the 90 minutes and we can take a lot of positivity from tonight's game
"The players, when they did all they can like tonight, it is perfect
 We did a lot of good, we can analyse to continue to improve
 It's a fantastic victory
"Arsenal return to Premier League action at home to Bournemouth on Sunday
 You can follow the game with the  live blog from 1pm; Kick-off 2pm
 Their next Europa League game comes at home to Portuguese side Vitoria Guimaraes on October 24
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