According to a tweet from the Coventry Telegraph's Les Reid, Arena Coventry Limited are taking High Court action against Northampton Town FC.
The litigation action had been announced soon after the deal for Coventry City to groundshare the Sixfields Stadium was announced, but things went quiet.
Now, Mr Reid has said according to unconfirmed rumours that the owners of the Ricoh Arena are going through with their action to claim for damages over the planned groundshare.