Celta Vigo is a surprise semifinalist in Spain's Copa del Rey, ousting Cristiano Ronaldo and Real Madrid in a shocking upset.

Alavas reached the semifinal by defeating Alcorcon, a second-division side that never had previously reached a quarterfinal.

The two teams met in La Liga play two weeks ago and favored Celta pulled out a 1-0 win with a goal in the 89th minute.

Alaves need an all-important away goal to fan their hopes of reaching the final, while Celta are favorites to pick up the home win in this first-leg matchup.

Want to watch? Check out the details: 

Alaves side who have widely overachieved this term 

What: Celta Vigo vs. Alaves in the semifinals of the Copa del Rey tournament.

When: Thursday, Feb. 2 at noon Pacific time.

Where: Balaidos Stadium, Pontevedra, Spain

TV channel: beIN Sports (Comcast 643).

Online: beIN Sports Connect.

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