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Rule number one before playing Diego Simeone's Atletico Madrid side is not to make them angry...

But Arsenal have infuriated their Champions League opponents ahead of Tuesday night's showdown at the Emirates, who have made an official complaint to UEFA.

Atletico trained at the stadium on Monday afternoon but after working up a sweat on the turf, were unable to use their showers in the dressing room as there was no hot water. 

It had rained during the session so Atletico opted to get on their team bus in dirty kit before travelling back to shower at the team hotel. 

Atletico informed their hosts about the situation shortly after 5:30pm upon arrival but Arsenal were unable to fix it before Simeone and his squad left. 

The Gunners managed to have the hot water working again by the time Atletico were scheduled to finish training but the Argentine boss called time on it early. 

Atletico Madrid trained at...

Continue Reading: Atletico anger at Arsenal 'dirty' tactics: Emirates hot water failure

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