Álvaro Morata's winner in the Ciutat de Valencia
The then-Real Madrid striker came off the bench with eight minutes left and required just one to head home the winning goal in 2012.
Update:
In 2012, Real Madrid were in similar straits as they are now, eight points off Barcelona's pace and facing a fesity Levante side in the Ciutat de Valencia. With the score at 1-1, José Mourinho threw Castilla striker Borja Mayoral into the fray and the youngster headed home the winner just a minute after coming on.