Doncaster have confirmed that the Football Association is investigating two incidents that occurred during their 3-1 defeat to Swansea.
The match in question took place last weekend and was marred by an allegation from Swans midfielder Leon Britton that Rovers man Richie Wellens spat in his face.
It is an accusation that the player strongly denies and his club have backed him to the hilt.
The clash at the Liberty Stadium was a lively affair with four bookings and a sending-off for two bookable offences for 28-year-old Wellens. Both yellow cards had nothing to do with the allegations.
"Doncaster Rovers Football Club can confirm that the Football Association is investigating two incidents which occurred during the Coca-Cola Championship fixture against Swansea City," a club statement read.
"Doncaster Rovers can also confirm that one of the incidents is the alleged spitting by Rovers midfielder Richie Wellens.
"Doncaster Rovers Football Club will be defending Richie vigorously in the matter of these unfounded accusations.
"Doncaster Rovers are 100 per cent behind Richie Wellens and will do everything in our power to ensure that he is proved innocent."
The FA is also looking into a second incident which took place at the same time but does not involve the former Manchester United youngster.