In a boost for Relativity Media's new marketing and distribution operation, Bradley Cooper starrer Limitless opened to No. 1 at the Friday box office, grossing an estimated $6.6 million from 2,756 theaters. After that, it was a tight race between the two other new movies, the Matthew McConaughy legal thriller The Lincoln Lawyer and Universal's sci-fi comedy Paul, and two holdovers, Battle: Los Angeles and sleeper hit Rango.