Yes Plaguedeath was wrong, from the last 6 Manutd games in all competitions = they have won 3 times.

And from the last 6 Manutd games in the Premier League = they have won 4 times

This match is hard to predict because both teams are inconsistent and yes Both Teams To Score is a good bet for this match.
Interesting fact: Until now, Manutd is the only team in the Premier League that has never drawn.
Considering all these stats you bring, Manchester United need to win this match just to give their fans confidence and show the whole world that they can do it against Chelsea just as they win their last match against them.
Chelsea on the other hand need to win the match as well to maintain their consistency after their 3-2 win against Brighton side last weekend.
However, if you look at the statistics of their last five matches against each other, you will notice that four of them were drawn and Manchester United won the last one. As a result, Chelsea, with their good and quality players, will want to avenge themselves today by doing everything possible to get three points in order to keep their pursuit of the top four this season.