What's actually Onana doing? 
He should able to save that because it's an easy shot. Not surprising to see his rate is 3.2, he played really poor in this match.
Ruben Amorim turned out to be no better than Erik Ten Hag, Man United dark system will indeed be quite difficult to solve. In the match against Nottingham Forest, there were many mistakes especially when Amorim made a lot of player rotations. The goal was to find a point of compatibility but it also made Nottingham Forest aware of Man United game system and used it as an opportunity to steal a goal. Onana, who is usually able to appear overpowered, but today is very different from his previous appearance. Man United to become the only English giant club that is most unlucky. While Chelsea who last season performed below Man United, managed to achieve the best results with Enzo Maresca.He should able to save that because it's an easy shot. Not surprising to see his rate is 3.2, he played really poor in this match.