So you'd rather him throw away the only possible trophy that Chelsea actually has a chance of winning this year?
I'm looking at the numbers and finishing in the top 4 is going to be tight. Arsenal's probably going to finish at 73 points, so they'll be in as long as they don't screw up. Assuming that Tottenham beat Southampton, Stoke, and Sunderland(I think they have a good chance of doing this), they'll be at 71 points if they lose to us, 72 with a tie, and 74 with a win. For Chelsea, with a win against United, can still finish 3rd even if we lose to Tottenham, if we beat Villa and Everton(74 points with better GD). A draw against Man U won't affect the chance at top 4 assuming everyone wins, because if we were to lose to Tottenham we'd still be out. Clearly this assumes everyone beats their other opponents, but if it plays out this way, we have to try to beat Man U this weekend because a draw or loss would be the same thing as far as final points go because we'd still be up if we win or draw against Tottenham and down if we lose.
I wouldn't mind Mata or Hazard sitting today and only coming on if we need a goal, because they each have a lot of minutes over the past 10 days considering we have 2 games where we'll have to have them in 6 days. If they do both start, hopefully we can get an early goal and let them sit after that.