Chelsea's Gary Cahill says it is "incredible" he was not given a free-kick before Swansea scored their second goal in a 2-2 draw on Sunday.
Gylfi Sigurdsson had just cancelled out a Diego Costa opener when Leroy Fer robbed Cahill and beat Thibaut Courtois to put Swansea in front in the Premier League game at the Liberty Stadium.
Replays showed Fer had kicked the back of Cahill's legs but Andre Marriner allowed the goal to stand - much to the frustration of Chelsea boss Antonio Conte, who told Sky Sports the referee had made "a bad decision".
Cahill went further, posting a video of the incident on social media accompanied by the word "incredible" and a series of angry-faced emojis.
The England defender later deleted his tweet, but in a post-match interview with the BBC he claimed the officials could have been "sat on the moon" and still spotted the offence.
He said: "It's a clear foul. Come on, seriously. It was clear as day and seeing it back has made me even more angry.
"I said to the referee 'there's three of you that can see that'. There were two fouls on me and between the officials they have said that they couldn't see it. For me that is incredible.
"I took the touch away from him, he came through the back of me. It's all fun and games for the fans - but it's the players who suffer. That kills me and kills my team. We have dropped two points which is massive in this league."
Cahill's defensive partner John Terry also used social media to make a point in the hours after the game, posting an Instagram image of some close marking at a Chelsea corner.
Terry also posted a picture of his injured ankle after leaving the stadium on crutches.