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By Emma Sanders
BBC Sport
Teen striker Gabriel Martinelli set up another to give Arsenal success and scored two goals.
There was three minutes involving the Brazilians first and second goals while 20, Joe Willock, made it 3-0 before half-time.
Martinelli, who combined for # 6m this summer , later set up for his first Arsenal goal.
Arsenal sit Group F with 2 wins from two matches.
There were 10 changes to the Arsenal group who pulled with Manchester United in the Premier League.
Instead, director Unai Emery put faith in the likes of academy grad Willock, Reiss Nelson that is 19-year-old and Martinelli – as well as summertime registering Kieran Tierney, making just his second start.
After all four amazed handed up Nelsons shot at the build-up into the target of Willock, as Tierney setup Martinellis first with a thumping cross.
Nelson recorded a help – feeding Martinelli because of his next – before slipping at the Brazilian to tee Ceballos goal in the second half.
It might easily have been on a positive night which also watched full-back Hector Bellerin make his first start at over nine months after a knee injury.
Martinelli was a fan favourite once that he became the youngest player since Alex Oxlade-Chamberlain at 2011 to score on his first start to Arsenal, against Nottingham Forest in the Carabao Cup.
Two goals in that 5-0 win was the ideal way for summer time signing to declare himself and every time that he got to the ball at the Emirates on Thursday the crowd grew excited.
His caliber was evident against Standard Liege although the adolescent spent last season playing using Ituano at the fourth tier of this Football League and he has bagged four goals after just two starts for the club.
His first of the night was exceptional – a header at the near post which flew past goalkeeper Vanja Milinkovic-Savic – while his next was impressive, drilling the ball and then cutting on to his right foot.
Both targets drew a smile from Pierre-Emerick Aubameyang and there could be a case for Martinelli whether the Gabonese striker hadnt scored seven goals in this year.
The Brazilian capped an amazing night with a great assist – onto a plate to get Ceballos to tap and revealing pace until coolly lifting it over the 27, to reach Nelsons pass.
Arsenal director Unai Emery on BT Sport:To get six points after both matches, it is essential. The players, if they did it is perfect. We did a great deal of great, we could analyse to continue to improve. It is a victory.
We can improve in the way to maintain the ball and make more opportunities but for your players [on Thursday], theyre very tired after playing on Monday and they played fantastic, its a fantastic victory.
On playing young playersWe have to provide the opportunities to this young players and they are taken by them. Theyre near to playing for us in the greatest levels. They showed they can play and theyre able to score. Theyre playing well, it is great.
Arsenal goalscorer Joe Willock on BT Sport:One of my goals is to get more targets in my game and its even better that my aim and my groups goals has also have a clean sheet. The director advised us to keep moving even if its three or four nil. Get more goals and we wish to receive the ball back. He moves that.
We have a supervisor here who would like to play youngsters and I have to ensure I take my chances and prove why that is the way ahead.
Arsenal yield to Premier League action on Sunday when they host Bournemouth at Emirates Stadium. Their next Europa League game is at home to Vitoria Guimaraes on Thursday, 24 October.
The boys take a stroll on the wild side

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