I agree with most people on here that Bartley was excellent yesterday, his best performance for United so far AND man of the match for me. True, he could have blown it at the end on Parkin BUT to be fair, he shouldn't have been put in that position. PNE launched that ball from left back without any pressure from a throw in and the forwards should have been closer and tighter to make it more difficult than that.
Back to Kyle VI, yesterday was the first time I could see the class that says 'Premier League club centre back' although he remains a couple of years away. If I was Wenger, I'd be hoping for a similar situation to develop with United and Bartley as has done with Chelsea and Mancienne at Wolves. Gradual improving team, gradually improving player, promotion and find out how good he is. He set a high standard though and I would now suggest that the defence should be Calve - Bartley - Morgan - Jordan and Nos should provide cover with Lowton and Taylor/Kozluk. Bartley needs to now consistently perform at that 7/8 out of 10 level for United. One thing is certain for the lad, if he can stay in the team, he's got to improve - a season in the Championship makes a young PL centre defender IMO.