The Court of Arbitration for Sport (CAS) has chosen to reject Atlético Madrid's appeal against the two-window transfer ban imposed on the LaLiga club by FIFA.
Atlético cannot register players this summer
The ruling, which had originally been expected on Wednesday, means Los Rojiblancos will not be able to register any new signings this summer.
However, they will be allowed to recall any footballers who are currently on loan at other clubs and promote from their 'B' team. They will also be able to sell players.
CAS maintains the prohibition to register players until the 1st of January of 2018 https://t.co/vhWpztBZVY— Atlético de Madrid (@atletienglish) 1 June 2017
Atleti can register players again in January 2018
Having already served the first part of their suspension in the 2016/17 winter registration period, Atleti will be free to sign up new recruits again next January.
Atlético and city rivals Real Madrid were both handed two-window bans in January 2016 over irregularities in transfers involving international minors, with Real's punishment later reduced to one window on appeal.
CAS decision "unjust", say Atlético
Reacting to Thursday's CAS verdict, Los Colchoneros branded the rejection of their appeal "unjust", adding that it "poses an unfair disadvantage in comparable cases and causes an irreparable damage to our club".
This ruling is unjust, poses an unfair disadvantage in comparable cases and causes an irreparable damage to our club https://t.co/vhWpztBZVY— Atlético de Madrid (@atletienglish) 1 June 2017