A result which not many would have predicted, Gijon beat Atletico 2-1 with late goals from Carlos Castro and Antonio Sanabria.
Atletico who now find themselves 8 points behind league leaders Barcelona looked uncharacteristically sloppy, and their struggling opposition made them pay.
After a great first-half free kick from Griezmann it seemed as though Atletico were going to ease their way towards three points, however a poor second half performance from the visiting side allowed the home side to bag two, and to miss an open goal.
The win moves Sporting out of the bottom three and sends Diego Simeone's side to their first defeat in eight league matches.
Barcelona with a game in hand play Villarreal on Sunday where they hope to extend their lead at the top.