a product of hometown real zaragoza's youth system, lafita was born in zaragoza, being promoted from their reserves after stellar performances during the 2004–05 season and making his first-team – and la liga – debut on 28 august 2005 in a 0–0 draw at atlético madrid. he went on to become an important element in 2006–07, helping the aragonese to a berth in the uefa cup after contributing with 28 games and one goal, in a 2–0 away win against racing de santander on 10 december 2006.