Raul poked home Robinho´s cross to put the visitors in front after 13 minutes and substitute Gonzalo Higuain wrapped up the points in stoppage time.
Bernd Schuster´s side are now 10 points ahead of Villarreal and 11 of Barcelona, who drew 0-0 with Espanyol on Saturday, with only five matches of the season remaining.
Copyright (c) PA Sport 2008, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms