at the time of writing Manchester United are playing against Arsenal, It will not be an easy game for Manchester United, but Arsenal are not a very reliable team either, I would not be surprised if I saw a draw in this game
Manchester United's chances of being able to score in 30 minutes (this minute is valid at the time of writing this) are very small considering Manchester United's expected goals (xG) are very small from Arsenal's expected goals (xG).
When Manchester United get the ball to make an attack, it doesn't last long and the ball is immediately held back by Arsenal players. This is not encouraged by Manchester United's line-by-line assistance.
Now time is playing on United, because Manchester United's defense is playing very well and it is clear that Arsenal can't find the weaknesses in United's defense and such a difficult and tight game in the center of the field is on United's hand, taking into account that Arsenal have big problems with strikers and except for Trossard Arsenal have no strikers.
So I think if United score first, Arsenal will have to go on the attack and United will have a chance to catch Arsenal on the counterattack.