Great Britain's women's curling team lost in an extra end when it was ruled that they made a hog line violation.
A sensor in the stone went off, suggesting Great Britain's Eve Muirhead did not release the stone before the hog line.
Replays appeared to show that Muirhead released it before the hog line although it is unclear if she touched the stone again after the initial release.
Muirhead called the ruling "gutting."
The Great Britain women's curling team lost in brutal fashion on Sunday in the Winter Olympics when a controversial call ended their match in extra ends (overtime).
As Great Britain's Eve Muirhead released the stone, a sensor went off on the stone that meant she did not release the stone before the hog line, the point at which the stone must be released.
The violation meant the stone was voided, and it helped Sweden secure an 8-6 win, as they had an easy path to the house without Great Britain's stone.
However, the violation was controversial. There's no official replay in curling, but on video replay during the broadcast, it appeared that Muirhead had let go of the stone before the hog line.
Even Muirhead afterward seemed to question the call.