Rayo Vallecano boss Paco Jemez blasted his side's defending as "shameful" after their 3-0 home loss to Athletic Bilbao on Friday.
Rayo's hopes for a top-half finish took a blow in Vallecas as goals from Mikel San Jose, Oscar de Marcos and Ander Herrera sealed Bilbao's spot in next season's UEFA Champions League.
Jemez's side still sit ninth but can be overtaken by a host of sides over the weekend after their first home defeat since February.
And the manager slammed his side's defensive efforts from set-pieces, the source of all three goals.
"We competed well, but we lacked fluency," Jemez said.
"And against a team like Athletic, you can't afford to do that.
"The worst part of our game was our defending at set pieces – it was shameful, horrible.
"The first two goals were our fault, there's no doubt about that. They were much better than us – no complaints about that."
|Coach: Paco Jémez|
for Rubén Rochina 37'
for Gálvez 68'
for Roberto Trashorras 75'
|Southampton need three January signings, says Watson|
|Liverpool can make Champions League, says fanzine editor|
|Walsh: Hull clash crucial for Leicester|
|Toure, Aubameyang and Enyeama make shortlist for African gong|
|Docherty backs Chelsea to win two-horse race|
|Liverpool could benefit from Hyypia influence - Scales|
|Saudi Arabia name Asian Cup squad|
|Forty-year-old Cahill no problem for Postecoglou|
|Wenger criticism baffles Redknapp|
|Leicester must strengthen in window - Walsh|
|United not title contenders - Docherty|
|Koeman: Southampton youngsters will get a chance|
|Dyche empathises with Liverpool striker crisis|
|Cagliari turn to Zola|
|Rooney thanks Van Gaal for Christmas break|
|Cruzeiro offer Paulinho Tottenham exit chance|
|Carlisle´s wife grateful to Burnley|
|Katebe called up to Zambia AFCON squad|
|Cape Verde name AFCON squad|
|Finke names much-changed Cameroon squad|
|Grant omits World Cup troublemakers for AFCON|
|Blackpool striker Ranger goes AWOL|
|Allardyce relishing Mourinho meeting|
|Ashley fails to increase Rangers stake|
|Crystal Palace v Southampton: Koeman calls for focus|
|Warnock targeting striker in January|
|Chelsea v West Ham: Adrian vows visitors will attack|
|Heskey signs short-term deal at Bolton|
|Everton v Stoke City: Martinez eyes strong form|
|Juninho defends David Luiz|
|Burnley v Liverpool: Dyche defends Rodgers ahead of Turf Moor test|
|Arsenal v QPR: Wenger eyes festive momentum|
|Liverpool are growing in confidence, says Rodgers|
|Redknapp: Austin future could depend on survival|
|Martinez wants Everton consistency|
|Barca want Neymar until 2020, says agent|
|Jones undeterred by pressure of Liverpool starting role|
|Allardyce ´knows how to beat managers´ - Carroll|
|Jones playing for a new contract|
|China select Evergrande spine for Asian Cup|
|A-League Preview: Koren tips City to build|
|Khedira keen to fight for Real spot|