I believe that the poor players of Blackburn, who will know that they won't play in this league next season, will do everything to finish the Premier League year with a positive memory that could be a decent performance against maybe the winners of this year's Champions league! This is the mind that will definitely come up in their minds and it will be a huge influence to them, so I believe there is great value in this bet.
Chelsea won the first meeting in Blackburn 0-1. However this game goes on, I can't see Blackburn losing by two goals or more in all the mentioned circumstances.
Source: BBC