Jose Mourinho admitted his concern at Real Madrid's lack of success in front of goal this season after seeing his side drop two valuable points at minnows Levante.
Promoted Levante had conceded ten goals in their opening four matches - the worst record in the Primera Division - but they held Madrid to a 0-0 draw at the Ciutat de Valencia to help knock Mourinho's men off top spot.
It was a frustrating night for Madrid, who bossed the game and peppered the Levante goal with shots and crosses but could find a no way through a well-organised and determined home defence.
Madrid's inability to make their chances and domination count is not a new thing this season, with Mourinho's side having only netted eight goals in their six league and Champions League matches despite having the opportunities to score many more times, and the Portuguese knows it is a pressing problem.
"We created so many chances, some very good, and obviously I'm worried because you need to score to win,'' Mourinho said. "Every point counts, but for us every game we play is one we have to win. So these are two points less than we could have. We're not happy about earning only one point because we must win every match.''
He added: "Defensively we are a very solid team, we have only conceded one goal in six official games. There is no problem tactically, but we aren't scoring. It's not due to the quality of the players because we all know they are players with lots of goals in them, but at this moment we can't score. That's my only concern.''
Barcelona coach Pep Guardiola also wants his side to show more killer instinct in front of goal after seeing them leave it late before securing the three points against Athletic Bilbao. In a similar situation to arch rivals Real Madrid, Barca have yet to truly find their scoring form in Primera Division this season and, having squeezed past Sporting Gijon 1-0 in midweek, were again made to sweat before sealing a deserved 3-1 triumph over Athletic at San Mames.
Despite playing against ten men from the 34th minute and taking the lead just after half-time through Seydou Keita, Barca had to wait until 16 minutes from time to earn a more comfortable advantage with Xavi netting their second.
Athletic threatened a late scare for the Catalan outfit when they pulled a goal back through Igor Gabilondo after Barca had lost David Villa to an 87th-minute red card, but the visitors secured the points thanks to a third goal from Sergio Busquets. That victory lifted Barca up to second spot and within a point of leadersValencia, but Guardiola was left wanting more from his side.
"We must have more desire, more ambition to say 'I'm in front of goal and I have to score'. When we create chances around the six-yard box we must score them,'' Guardiola said. "We had a good game when it was XI v XI, we did well at the back, limiting the aerial play of Athletic.
"In the second half we attacked well and, to be honest, I'm very happy because matches at San Mames are tough. But we must finish games off (earlier) and we didn't do it. In any case the team has looked in good touch and I must congratulate the players because they've had a great game.''