The chance for Cheslea is about 50 percent according to the rates we can see but the chance for Aston Villa is 25 percent and this shows us that even if Cheslea doesn't win this game still Aston Villa can't have too much chance against this team.
Here are the updated rates for this match I think considering the weak performance of Chelsea and the unstable results they got, we can't try betting on a draw.

Don't just rely on statistical data because its not certain that Chelsea can win this match, its true that Chelsea chances are bigger, but look at Chelsea current development, which has experienced a lot of decline this season.
Meanwhile, Aston Villa is experiencing a lot of improvement so that they can enter the top 10 of the standings. I think this match will be quite difficult for Chelsea because now they have to be serious about winning the match so that they don't continue to be at the bottom of the standings. It helps Chelsea a little because they will be playing at home, and I hope Mauricio Pochettino can organize and improve the performance of his men and strengthen the teams defense so they can win this match.