Barcelona player ratings vs Rayo Vallecano: Dani Olmo to the rescue! £51m signing scores debut winner as Robert Lewandowski endures miserable evening

Dani Olmo was the hero for Barcelona as the midfielder scored the winner on his debut in the Blaugrana’s 2-1 win against Rayo Vallecano.

The Spaniard, who missed Barcelona's first two matches of the season as he couldn't be registered, came on at half-time and scored with 10 minutes remaining to make it three league wins in a row for Hansi Flick's side.

Barcelona had to come from behind in a hard-fought victory in Madrid.

GOAL rates Barcelona's players from Estadio de Vallecas…