I reckon United will win it tonight.
I fancied Liverpool earlier, but Lallana and Wijnaldum both being out is massive. They've been so creative and provided great service to the front players. Now with a midfield two of Henderson/Can, I'm not sure the front four get the same quality of service. That was one of Liverpool's big problems last season. I can't see Liverpool's build up play in the defensive and middle third being good enough tonight.
United not scoring from a set piece tonight would be a big surprise. Mourinho has fielded a team of giants and defending crosses and set pieces are Liverpool's weak points.