A total of 62 clubs, five more than the previous edition, were accepted to enter.

The competition commenced on 24 October 2012 with the First Round and concluded on 11 May 2013 with the Final, held at Olympic Stadium.

The following 62 teams competed in First Round: Each tie in the knockout phase, apart from the first two rounds and the final, was played over two legs, with each team playing one leg at home.

The team that scored more goals on aggregate over the two legs advanced to the next round.

If the aggregate score was level, the away goals rule was applied, i.e. the team that scored more goals away from home over the two legs advanced.

If away goals were also equal, then extra time was played.

The away goals rule was again applied after extra time, i.e. if there were goals scored during extra time and the aggregate score was still level, the visiting team advanced by virtue of more away goals scored.

If no goals were scored during extra time, the winners were decided by a penalty shoot-out.

In the first two rounds and the final, which were played as a single match, if the score was level at the end of normal time, extra time was played, followed by a penalty shoot-out if the score was still level.The mechanism of the draws for each round is as follows: The draw for this round took place on 13 October 2012.