Valencia started the game strong, with Diego Lopez and Hugo Duro creating chances early on. Duro's shot went wide, but it was a sign of things to come for the visitors.
Rayo Vallecano had their best chance of the first half when Jorge de Frutos headed the ball towards goal, but Giorgi Mamardashvili made a stunning save to keep the score level.
Just before halftime, Valencia took the lead through a Cesar Tarrega own goal. The center-back nodded the ball into his own net after a cross from Pedro Díaz.
In the second half, Rayo Vallecano dominated but couldn't find the net. The best chance came for Valencia when Alvaro Garcia headed the ball towards goal, but Mamardashvili made a comfortable save.
With 20 minutes left, Valencia had a golden opportunity to score, but Rafa Mir's shot went over the bar. Five minutes later, Umar Sadiq scored a late equalizer for Valencia, hitting the post and then poking home the rebound.
The match ended in a draw, with both teams sharing the spoils. Rayo Vallecano missed out on a chance to jump into the top eight, while Valencia continues to sit comfortably in midtable.
Andrei Ratiu was named Flashscore Man of the Match for his performance.
Check out all the match stats with Flashscore.