Bellerin will be out for a month or more, and his pace will be sorely missed against the likes of Martial and Rashford.
Hector has developed into an all-round great player since breaking into the first team - yes he's a right back, but he has so much pace and awareness that he virtually plays from midfield - probing forward and able to get back for his defensive duties as well. He's the sort of player who simply gets on with the job, and only when he's not there do you realise what a job he does for the team.
Carl Jenkinson will deputise, and has big boots to fill. With all due respect to the lad he can't hope to match Bellerin, but we still need him to do a job.
Alexis Sanchez is the proverbial footballing Duracell Bunny, and it's up to the manager to assess his fitness following his injury playing for Chile.
He says:
‘I know him so well, like all my players that I observe every day, so I will be able to see if he was playing with a restriction or not. But the first goal he scored, he ran from the halfway line – if you are really injured with a hamstring you cannot do that.
‘He always says he is okay! It is a very difficult one because I am sure he will come back saying he is alright.
‘What I will consider is the risk of injury, because he played while recovering from a hamstring injury. I’ll consider the way he feels as well.
‘On that front, you depend on the honesty of the player, how they feel and how they recover.’
A fit Sanchez makes a huge difference - let's hope that's what we get.
It's anyone's game to be honest. United aren't on top form, but equally we rarely find our rhythm at Old Trafford.
We need the points, so let's hope that it ends in our favour.
United have Rooney available, but Ibrahimovich is suspended.