Arsene Wenger's 60th and final game against Manchester United as Arsenal manager ended in defeat as the Red Devils took all three points right at the death. The final scoreline read 2-1 with the winner coming in the 91st minute.Paul Pogba gave United the lead in the 16th minute before Henrikh Mkhitaryan grabbed an equaliser against his former team in the second half. However, it was a Marouane Fellaini header in stoppage time that gave United the win to break Wenger's heart.Here are the major talking points from the game:#MerciArsène pic.twitter.com/w6VH6hkQNo— Arsenal FC (@Arsenal) April 29, 2018#1 Men vs Boys, but the kids are alrightArsenal's youngsters simply couldn't get close to Nemanja Matic in midfieldThe news spread like wildfire the previous night and most fears were confirmed when the squad that travelled to Manchester did not include Laurent Koscielny, Shkodran Mustafi, Aaron Ramsey, Mesut Ozil, and Alexandre Lacazette.The average age of the Gunners starting XI - 24 years 67 days - was their youngest since August 2011 when they lost 8-2 at the same venue. It was a stark contrast to the United side who were not only far more experienced but looked bigger, meaner, and more powerful on the pitch. The likes of young Reiss Nelson were easily brushed off the ball.24y 67d - The average age of Arsenal's starting XI (24y 67d) is their youngest for a Premier League game since August 2011, which was also at Old Trafford against Manchester United (24y 65d) when they lost 8-2. Inexperience. pic.twitter.com/gQ3SETeKlO— OptaJoe (@OptaJoe) April 29, 2018Their inexperience also showed when they didn't even bother appealing for fouls which would normally see players up in arms.The kids may be in the big leagues now, but they have a lot to learn about putting pressure on the referee and not let things slide - especially when Maitland-Niles had a good shout for a penalty but nobody said a thing.But Arsenal can be proud of this performance despite the loss. They didn't roll over like they did in the 8-2 game and competed with United all across the pitch over 90 minutes.