Italy,
20th place Parma defeat 1st place Juventus,
http://uk.soccerway.com/news/2015/April/11/allegri-juve-did-nothing-right-in-shock-parma-defeat/n574912/
Juventus is even 14 points ahead of 2nd, Roma probably plays and can surely gain a few points. Too late for that.
It's been a few years since that has happened in the Premier League, I can think of a few possibilities.
QPR Chelsea tomorrow, that one would have possibilities of an upset.