Diego Simeone and Carlo Ancelotti both hailed Atletico Madrid goalkeeper Jan Oblak, who made a string of excellent saves to keep Real Madrid at bay. The Champions League quarter-final first leg clash at the Vicente Calderon finished goalless and that was largely thanks to an outstanding performance from the Slovenian goalkeeper. He made a phenomenal save to deny Gareth Bale in the fourth minute and another fantastic stop kept James Rodriguez from opening the scoring in the first half. Atletico Madrid goalkeeper Jan Oblak denies Gareth Bale an early goal at the Vicente Calderon on Tuesday . Oblak gets down low to keep out a shot from Real Madrid's James Rodriguez in the second half . 'They are one of the best teams in the world at defending. Oblak did a great job,' said Real Madrid boss Ancelotti. 'I think, above all in the first half we deserved more than 0-0. Real Madrid's first half was fantastic, we played very well, with personality. 'The second half was different because they pressured us more and we had difficulty keeping possession. 'The result was not good, but we have gained confidence from that game, from what the team showed. The result is the best of the 'worst' results. 'They are little details, we had opportunities and everyone did great work in attack, but we didn't finish well. We have to repeat this performance in the Bernabeu next Wednesday. Carlo Ancelotti wants his side to repeat their performance at the Bernabeu next week despite failing to win . Cristiano Ronaldo is thwarted in his attempt to open the scoring against rivals Atletico Madrid . 'After this game there is still no favourite. It's as it was before we started. We have to repeat the game we played in the first 45 minutes. With two draws, you can still go through.' Simeone was also impressed with the performance of Real Madrid in the first half, but more so with that of his goalkeeper. 'In the first half the opponents were good. Oblak was great, especially for Bale's chance. 'And the best thing was the reaction we had. Any other team that had been damaged as we were in the first half would have ended up conceding. 'But the game became much closer to what we had imagined at the start.' Simeone also did not want to put the blame on Sergio Ramos for an incident which saw Mario Mandzukic left with a bloodied face. Sergio Ramos (left) catches Mario  Mandzukic with his elbow, cutting the Atletico striker's face . Diego Simone refused to blame Ramos for the clash, insisting that the Real defender didn't mean it . The two players clashed when challenging for the ball and Ramos' elbow caught the Croatian forward. 'Mandzukic had a hard game and competed against Ramos and Varane who are extraordinary players,' said Simeone. 'The hit with Ramos happened without him meaning to, so let's speak nothing more of it.' The teams meet again on Wednesday April 22, and Simeone, whose side have not lost to Ancelotti's in any of the seven clashes this season, is convinced that it will be a great game. 'We will go there with the idea of playing as well as we can,' he said. 'It will be a different game. It will be the classic game that we all like to play.'
Jan Oblak kept a clean sheet as Atletico drew 0-0 with rivals Real Madrid . Carlo Ancelotti admitted that Oblak 'did a great job' to keep his side out . Diego Simeone was also impressed with his goalkeeper's performance . Simeone refuses to blame Sergio Ramos for clash with Mario Mandzukic . Second leg of their Champions League quarter-final takes place next week .