The Striker headed in the first goal for Spain after which Kim Do-Heon secured an equaliser for South Korea before the first half ended.
Strikes from Xabi Alonso,Santi Cazorla and Alvaro Negredo sealed victory for Spain in the second half of a match played in Bern, Switzerland.
Del Bosque went into the game without the nine Barcelona and Athletic Bilbao players who were given time to rest after the Copa Del Rey final.
It is the first outing of the champions before they defend their European Championship title. They will be playing China in Seville on Sunday before heading to the tournament as one of the opponents of the Republic of Ireland in Group C.
Del Bosque said the squad is happy because there has been no injuries while training and two games have been played plus the fact that players have been relating well with each other.
On Torres’ goal, the manager said with his goal, he is now the fourth highest Spanish goal-scorer of all time which is why he is very pleased with his contribution.
He continued by confirming Torres as one of the players that offers combination play with his teammates adding speed and movement to it which provided the goal from the Spaniard and everyone is happy about this.