Arsenal starlet Ethan Nwaneri shone again in another pre-season start with the first-team as his side beat Manchester United 2-1. The teenager played for the first 45 minutes and impressed as he assisted a goal for Gabriel Jesus, and Arsenal fans are now convinced that Nwaneri is ready for competitive first-team action. Mikel Arteta made Nwaneri the youngest player in Premier League history two years ago, and also gave him a substitute appearance in a 6-0 victory at West Ham last season. Nwaneri is developing superbly, and the 17-year-old is reaching a level where he is ready for first-team ac…