Most goalkeepers would have got caught out with that goal, so I cant really blame Onana for that, however as I mentioned a few weeks back he is a goalie who does come forward a lot and quite far and quite readily. That may have worked fine for him in the Italian league but it is something he will need to learn to curtail a bit in the Premier League otherwise the speed and pace of the Premier League in general and the frontlines of Premier League teams will see him being caught out of position too often, I'm sure Ten Hag will help him with that