 Complete the following phrase:  On 27 August 2012, Petković officially transferred to Calcio Catania. The transfer fee involved was undisclosed, though Petković was inserted directly into the clubs youth academy following his arrival. His first call-up to the senior squad arrived on 27 January 2013, in a 21 home victory over Fiorentina in league play. His league debut came on the final matchday of the 201213 Serie A campaign, when he appeared as an 89th minute substitute in a 22 away draw with Torino. Ahead of the 