Number-six Xavier visits Marquette tonight in the Big East Conference opener for both teams. The Golden Eagles have dominated the series, winning 49 out of 71 meetings and sweeping Xavier last year.  Marquette guards Markus Howard and Andrew Rowsey are the top two scorers in the Big East, with the sophomore Howard scoring at a 21-point-eight clip and the senior Rowsey checking in at 20-point-seven.  Trevon Bluiett leads Xavier with 19-point-eight points-a-game.  The Golden Eagles will try to extend their four-game winning streak in the 7:30 p-m contest.