Porto could find themselves in trouble with UEFA after allegedly slamming match officials 's***-eaters' during their loss against Manchester City in October.
A report in The Sun details that directors from the Portuguese club hurled abuse at Latvian referee Andris Treimanis and his colleagues in the tunnel after believing decisions went agains them in their 3-1 loss at the Etihad on October 21.
The abusive language was heard by UEFA delegates and was included in the official game report, with the Portuguese club now potentially in further hot water after a week which has included an extraordinary row with City over a newsletter sent out to its supporters by the Portuguese club.