Barcelona have found themselves in a bigger trouble this season as they suffered back-to-back defeats in the league, which sees them stay ninth in the table, and they’re still without a win on the road this season.
Koeman will be hoping they can turn things around against Deportivo Alaves next time out.
Rayo’s winning run at home is now at five games as they move up to fifth. Next up for them is Celta Vigo.
Falcao’s first-half goal helps Rayo Vallecano to a 1-0 win over Barcelona. The hosts were the better side throughout, with the goal coming after Busquets was caught on the ball.
The Colombian was teed up, and he curled a low effort in off the inside of the post.
Barcelona’s only shot on target came from the spot in the second half after Depay was pulled down by Valentin, but he couldn’t capitalise as Dimitrievski made a good save to deny him and protect his clean sheet.