Arsenal youngster Ethan Nwaneri seems to have taken a big step forward during the club’s pre-season tour of the United States. Mikel Arteta has now handed Nwaneri back-to-back starts against Premier League opposition Bournemouth and Manchester United. And in truth, Nwaneri has arguably been Arsenal’s strongest performer across the two games, proving that he is ready for first team football. Ayden Heaven and Nwaneri have started both matches for Arteta, and whilst the defender has endured something of baptism of fire, Nwaneri looks comfortable at this level. The England under-17 international p…