UEFA have ordered Atletico Madrid to play with a reduced fan attendance due to the discriminatory actions of supporters during the first leg of their Champions League quarter-final tie against Manchester City last week.
Atleti fans were caught on camera appearing to perform Nazi salutes during their side's 1-0 defeat at Manchester City.
The Wanda Metropolitano will now be partially closed for City's visit on Wednesday. A section of the ground that contains a minimum of 5,000 seats must be closed, while the hosts must also display a banner containing the 'NoToRacism' phrase, alongside the UEFA logo.
A UEFA statement reads: "The UEFA Appeals Body has announced the following decision which would affect the attendance of supporters to UEFA matches.
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"To order the partial closure of the Club Atletico de Madrid stadium during the next (one) UEFA competition match in which Club Atletico de Madrid would play as the host club, for the discriminatory behaviour of its supporters.
"Club Atletico de Madrid shall inform prior to the match, the sector(s) to be closed, which shall at least comprehend 5,000 seats.
"To order Club Atletico de Madrid to implement the following directive in the next UEFA competition match which the club shall play as the host club: to display a banner with the wording '#NoToRacism' - with the UEFA logo on it."
A man was previously charged by Greater Manchester Police for alleged racist abuse during Atletico's last 16 clash at Manchester United last month.