Both players have had to wait until now to sign for Atletico due to the club's summer transfer ban. Former Chelsea striker Costa has been training with Atletico, while Vitolo has been playing on a short-term deal with Las Palmas.
Today, we lived an unforgettable day in the Wanda @Metropolitano to say goodbye to 2017. We presented @VitoloMachin and @DiegoCosta and trained in front of our fans.— Atlético de Madrid (@atletienglish) December 31, 2017
Happy New Year, Atlético fans! pic.twitter.com/nGs3d8yPaA