When the Scot went down under Vasili Berezutsky's ill-timed tackle, it appeared a certain spot-kick.
TV replays backed up that view but Portuguese referee Olegario Benquerenca showed Fletcher a yellow card for simulation.
"It is a penalty," he said.
"I have turned and the lad has just swept me off my feet. I have not tried to fall or stay on my feet or anything.
"When the referee blew his whistle I just thought "great, it is a penalty and we are back in the game". When I saw he was walking towards me with the yellow card I could not believe it.
"I am not having much luck with these cards. Hopefully it will change in the later stages."