If WHU lose and we can bury the eternal late season PL **** up v **** or relegated teams syndrome we could still catch them with another win as they'll likely lose their final two. Futile or even stupidly ambitious you might think, especially if we can actually get the unlikely 40pts to overtake them. Just think of it as a bit of extra protection if the Swansea go nuclear and win all three (which may seem extreme, but if they win tomorrow, it's well possible). Plus, looking at Chelsea's fixtures, they should have it in the bag come final day anyway. The only question mark is WBA away. WBA have downed tools but do still generally raise it for the big teams, but bend over for the fighting spritely ones (ie in this case, Swansea)
If they lose this they've got Liverpool home and Burnley away to come. They could quite easily lose both those.