Unai Emery has placed a fair amount of focus on experience with his purchases so far.Sokratis, Stephane Lichtsteiner and Bernd Leno may vary in age but all have extensive gametime in the higher echelons of European football - something that can be used to Arsenal’s benefit when naive defending is perilously close to costing us points.Even Lucas Torreira has a decent amount of time spent in Serie A, so we have upped our experience levels for the coming season, but Emery is also known to cultivate young players - and in Reiss Nelson, he has one hell of a diamond to polish.Nelson is perhaps our most well known youth in our ranks, and there is much expected of the 19 year old. His dazzling displays in our pre-season last campaign put him in the spotlight, and he made a Europa League spot his own thanks to his trickery and confrontational style that makes things happen on the pitch.Off the pitch though, nothing is happening. Reiss Nelson has still not signed a new deal.Nelson was offered a new contract before last season ended - but understandably, the winger would not have been keen to commit given Wenger was leaving.Now that Emery has given him a couple of friendly games and included him in the pre-season trip to Singapore, will Nelson be swayed into committing to the Gunners?There will be no shortage of takers should he decide to up sticks and leave - and in Chris Willock and Marcus Mcguane of Benfica and Barcelona respectively, he can see that there are options elsewhere. These two players left the Arsenal setup recently and are prospering.We are at a point with Nelson now that we must offer him certain guarantees of minutes on the pitch. A season spent in the squad but not playing will do nothing for the kid but make him rusty.To grow, he must play.At the same time though, he is at Arsenal, and must realise that he will play only if he is good enough. If he continues to apply himself like he has so far, then the signs are good.We can only pray that his agent is of sound mind and not one to lure Nelson away with promises of more money.He is at the right place, training with fantastic players and where he has a genuine chance to break into the first team. Last season was a giant stride, now he needs a few more games and to improve his end product and we will have a prodigy on our hands.The ball is in Nelson’s court - will he stay or go?