Rayo Vallecano have been promoted to LaLiga following a 1-0 win at home to Lugo on Sunday.
Alex Moreno's strike five minutes before half-time was enough to seal all three points for Rayo and a return to Spain's top flight, two years on from their relegation.
Third-place Sporting Gijon were 2-1 winners over Granada but now cannot catch the top two of Rayo and Huesca with just one round of matches left to play.
A pitch invasion greeted the final whistle at Campo de Futbol de Vallecas, as Michel's side celebrated promotion just a year on from a 12th-place finish in a difficult first season back in the second tier.
Rayo could yet win the LaLiga 123 title, having moved a point clear of Huesca, who were beaten 1-0 at home by Gimnastic de Tarragona just six days after winning promotion with their own defeat of Lugo.
The only way is up! ⬆️— LaLiga (@LaLigaEN) May 27, 2018
⚡ 2017/18 (as coach)
Michel has won promotion with @RayoVallecano 5⃣ times, (four to #LaLigaSantander & one to #LaLiga123)! 🔝🙌 pic.twitter.com/EzBvFGVnIn