SaturdaySporting    vs  Rayo       18:00Mallorca   vs  ZaragozaBarcelona vs  R.Madrid  20:00    Sevilla      vs  Levante    22:30    SundaySociedad  vs  Villarreal  12:00 Granada  vs  GetafeRacing    vs Athletic      16:00    Atlético  vs  Espanyol   18:00    Valencia vs  Betis          21:30BARCELONA Xavi Hernandez says Barcelona will stay true to their football philosophy as they seek to gain a potentially decisive victory over Real Madrid at the Camp Nou on Saturday.Madrid have seen their ten-point lead at the top of the table dwindle over recent weeks, and Barca would move to within a point of the leaders should they secure victory this weekend.Xavi feels the outcome of the match is far from certain, but believes a victory for either side would have huge significance in the title race."The league depends very much on the outcome of this game,” he told Gol TV. "We will try to claim the win and move to within a point of the top. We are thrilled that we’ve been able to reduce the gap from ten points to four."We have home advantage and we will try to put on a good performance to get the three points that we need.”Barca have established a reputation for dominating possession in every match they play and, while Jose Mourinho tends to tailor his approach to the match in question, Xavi says his side will simply continue with their usual strategy."We try not to change our philosophy,” he said. "We try to be the protagonists. Madrid have taken various approaches, but we have not changed our style for any match.Lionel Messi and Cristiano Ronaldo will again be battling it out to claim the headlines and, asked if he believes Messi is the world’s best, Xavi said: "Yes, and I think most people in football think the same, but obviously Cristiano is a great footballer. They are the two players most capable of making the difference on the pitch, but Messi is peerless.