Espanyol conceded in injury time to draw Valladolid 1-1 and missed a chance to take the outright lead in La Liga on Friday.
Espanyol were in front until Italian forward Daniele Verde converted a free kick a minute into injury time to even the match and keep the visitors from moving past Catalan rival Barcelona at the top of the standings.
Espanyol now have the same 18 points as Barcelona but trail on goal difference. Barcelona host Real Madrid in the league Clasico on Sunday at Camp Nou.
Forward Borja Iglesias put Espanyol ahead with a powerful right-footed shot from outside the area in the first half. Verde's late free kick appeared to deflect on the wall, taking goalkeeper Diego Lopez out of play.
It was the first league goal for Verde, who is playing on loan from Roma.
Promoted Valladolid, owned by former Brazil striker Ronaldo, had won four straight and could have joined Barcelona at the top had it won the home match. It has 16 points and is in sixth place. The team's next league game is at Real Madrid.
Espanyol haven't lost since a 1-0 defeat against Madrid at Santiago Bernabeu in the fifth round.
Valladolid are playing in the first division for the first time since 2013-14. Ronaldo, a two-time World Cup winner and a former Madrid and Barcelona striker, became a majority stakeholder in the club this season.