Mourinho deferred to assistant Steve Holland for post-match media duties after being dismissed from the touchline for berating the officials to a chorus of "Jose Mourinho, he sits where he wants".
The manager took his seat behind the dugout and next to a surprised fan, who took a photo of himself alongside his neighbour and posted it on Twitter.
Holland insisted Mourinho was right to be frustrated by the perceived time-wasting of Cardiff.
"His frustration was clear and, in my opinion, totally justified," Holland said.
"Why would it take an hour before finally an issue was addressed? He showed his frustration and then was sent to the stands."
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