Karim Benzema netted a goal in each half as 0 win over Racing at the Santiago Bernabeu on Saturday.
The result stretches Madrid's lead to 13 points over second-place Barcelona, which hosts Valencia on Sunday, while Racing remains in the bottom three, two points from safety.
Racing was then reduced to 10 men in the 39th minute when Domingo Cisma picked up a second yellow card after he handled the ball just outside the penalty area.
Benzema scored on the stroke of halftime to double the lead after he was played into the area on the left and threw a shot at the net from a tight angle that found its way past goalkeeper Tono.
Angel Di Maria's goal in the 73rd minute made it 3-0 as he scored with a well- struck shot from outside the area, while Benzema tallied his 13th goal of the campaign in the 89th on a deflected shot that gave Tono no chance.
Getafe 1, Espanyol 1
Getafe, Spain - Getafe and Espanyol shared the points at the Alfonso Perez Coliseum on Saturday as each side netted a second-half goal in the 1-1 draw.
Getafe had the better of the play in the first half but fell behind in the 66th minute when Alvaro Vasquez beat the offside trap and fired his shot past goalkeeper Miguel Moya.
But the home side was back on level terms four minutes later when Miku was brought down inside the penalty area by Thievy Bifouma, allowing the Venezuelan to pick himself up and beat goalkeeper Francisco Casilla from the spot.
Espanyol remains in fourth with the result but can be passed by a handful of teams in Sunday's matches, while Getafe stays in the middle of the table.
Sevilla 2, Osasuna 0
Seville, Spain - Sevilla snapped an eight-game winless run on Saturday by handing Osasuna a 2-0 defeat at the Ramon Sanchez Pizjuan.
Gary Medel fired Sevilla in front with a shot from outside the penalty area following a pass from Alvaro Negredo in the 16th minute.
But despite having the better of the play the home side wasn't able to kill off the match until stoppage time with Jesus Navas finding Piotr Trochowski in the center of the penalty area and the striker placing the ball into the upper corner of the net.
Sevilla climbs into the top half of the league after the win, with Osasuna having won once in seven games to stay in eighth.