Real Madrid goalkeeper Iker Casillas admits the club have hit 'rock bottom ' following Tuesday 's 4-3 home defeat by Schalke in the Champions League . Carlo Ancelotti 's side have hit a disappointing run of form after surrendering top spot in La Liga to rivals Barcelona following Saturday 's 1-0 defeat at Athletic Bilbao having dropped two points six days earlier against Villarreal at the Bernabeu . Real still qualified for the Champions League quarter-finals despite Tuesday 's defeat and Casillas is keen to look forward and stop the rot . Iker Casillas admits Real Madrid have hit rock bottom following Tuesday 's 4-3 home defeat by Schalke . Gareth Bale , Alvaro Arbeloa and Cristiano Ronaldo look frustrated as Real Madrid were booed off the field . Casillas insists his Real Madrid team-mates acknowledge the home supporters following the loss . Speaking to Spanish sports paper AS , Casillas said : 'We have hit rock bottom in a resounding way but the positive is that next week we play again and we can forget the last ten days . Because they have been ten dramatic days . The Spaniard , who suggested Madrid have a chance of turning things around when they face Barcelona a week on Friday , admits Real must improve if the club are to progress any further in the Champions League . 'We are not up to the standards we should be as Madrid and the quarter-finals of the Champions League , ' said the 33-year-old . 'We are in a privileged position and now what we have to do is think about tomorrow . We ca n't look back , nor can we remember those 22 victories or other things we have succeeded in . ' Schalke players celebrate Leroy Sane 's goal during the German side 's shock 4-3 victory in the Spanish capital . A group of Real Madrid fans waved a white handkerchief after the final whistle following a disappointing result . Schalke took a 2-1 lead on 40 minutes after Casillas' unconvincing save from a Max Meyer shot led to Klass-Jan Huntelaar 's first goal of the night . However , the Spain international insists it is not a time to scrutinise his own performance . ' I think a goalkeeper is always to blame . It was not one of my best games but it 's not a time to think about yourself . Despite not doing what we should have done , we were able to get through . 'The sooner we get the fans on board the better . We were n't at our best . ' Casillas failed to keep hold of Max Meyer 's shot which led to Klass-Jan Huntelaar giving Schalke a 2-1 lead . At the final whistle , Casillas insisted Cristiano Ronaldo - who cut a frustrated figure for most of the night - acknowledged the fans . The former Manchester United winger did not appear to be too happy at the end of the game despite his side 's progression in the Champions League . Ronaldo shook his head in disgust repeatedly and stared into the camera with a frosty glaze following Real Madrid 's 4-3 defeat on the night . In fact , Ronaldo was so angry that he told reporters : ' I wo n't talk again until the end of the season . ' Real Madrid fans jeered their side 's players throughout the defeat and waved white hankies to show their unhappiness at the performance . Casillas insisted Ronaldo - who cut a frustrated figure for most of the night - acknowledged the supporters . Ronaldo left the Bernabeu angry on Tuesday night and has vowed not to talk until the end of the season . Ronaldo stands motionless as Schalke players celebrate scoring a goal at the Santiago Bernabeu on Tuesday .
Real Madrid lost 4-3 against Schalke at the the Champions League on Tuesday night . Iker Casillas admits Real Madrid are not up to their usual high standards . Carlo Ancelotti 's men are currently going through a difficult run of form .