That is the opinion of Niall Quinn who believes referee Andre Marriner missed a foul on Blues defender Gary Cahill by goalscorer Leroy Fer just after the hour-mark at the Liberty Stadium.
Quinn said on Sky Sports: "There was no contact on the ball from Fer and that means something must have gone wrong. Cahill didn't slip over, there was a kick with Fer's right boot.
"He kicks him in the Achilles and any Swansea fans who think that was fair, need to look at the replay.
"You'll realise Andre Marriner got it wrong. I won't be too harsh on him because at the time we didn't see the foul in real time."
The Spanish striker then produced a stunning acrobatic side volley to give Chelsea a share of the points in the 81st minute.