Diego Costa has been officially unveiled as an Atletico Madrid player. He was presented to the press at the Wanda Metropolitano Stadium on Sunday morning.
The Spain striker returned to his former club from Chelsea in a reported £67m deal.
Costa signed a pre-contract agreement with Atletico back in September, after being frozen out at Stamford Bridge.
He has regularly been pictured in training with Atletico, but was unable to play for the club, as his signing came outside of the transfer window.
Atleti have also been under a transfer ban for the last two windows, after being found guilty of breaching rules over the signing of young players, but that ban ends January 1.