 Complete the following phrase:  In June 2010, Costa returned to the Colchoneros, initially as a backup to Sergio Agüero and Diego Forlán  Atlético also paid an undisclosed sum to Braga to buy all the residual 30 economic rights the former also had to pay in excess of 833,000 in agents fees to Gestifute. He was an unused substitute as Atlético won the 