Good prediction, Arsenal play at home and so do Newcastle so they are the favorites, for Liverpool themselves they play away but only against Southampton and it is still very possible for Liverpool to win and enter the semifinals.
As for Tottenham vs Manchester United itself I can't really predict it because the strength of both team is almost equal to the increase in Manchester United which has begun to be seen slowly, three match overall I take the favorite team to win with odds @3.20 and they really delivered well-deserved win.
Congratulations for your win though I understand you don't want to gamble on Manchester United vs Tottenham match because it's definitely difficult to choose. Gladly 3 out of 4 my predictions went true, honestly not really surprising because those match are easy to predict.
Out of nowhere, Gabriel Jesus scored hat trick for Arsenal, as we know he rarely score since he joined Arsenal.
In the upcoming match, Arteta might replace Havertz with Jesus.
I almost wrote against what you said about Newcastle and Brentford game but seeing that you quickly edited your post shows that you followed up the game till the full-time. @Helena Yu has given a very good prediction so far and seeing how all the games for today has successfully played out I think trying the Manchester United game against Tottenham that he predicted to end as draw is worthy to be tried because he seems to have studied the games so far. As a Manchester United fan I will be expecting them to win against Tottenham but if they managed to get a draw from away I believe Manchester United will be ok with the scoreline.
Thank you mate, yeah it's true Manchester United will likely to win, it just that their performance is still inconsistent.
When it comes to penalty, I would say Tottenham will win because as we know how bad Onana is.