Remember that odds don't play the game but the performance of the team matters in every match, the odd favours Manchester United to win the game and since they are playing at home they can start their performance well after they played 1:1 draw in their domestic league with the new manager in charge of the team. Amorim will have no issues winning against Bodo today because he was a major contributor to the good performance of Sporting in the champions league so I think the result will tidy will definitely be in favor of United.
Facing an opponent that is not so tough and Manchester United also has the advantage of playing at home so that Amorim can make a difference in his second match as Manchester United coach. I am more optimistic that this match will be won by Manchester United because there are many advantages that they currently have. Amorim only needs to evaluate the front line and fix the back line to be more solid, when this goes well then I am sure Manchester United's appearance will be much more convincing to get a win, especially the opponent they face is not so strong so it will be a little easier for him to get a win.