That has to be the best contribution in a Liverpool match by a round overinflated red object since Jan Molby left Anfield.
Because that's its name.
Our current home was built in West Park on the site of the old Circle cricket ground, and the stadium itself is called 'The Circle' as a result. However, as with an increasing number of grounds the naming rights were sold to a sponsor, in our case Hull-based phone/internet muppets Kingston Communications - hence our home is normally referred to using the sponsor-pleasing moniker 'The KC Stadium'.
I imagine the Football Manager folk use the non-sponsor version simply to avoid using company names more than they need to, and there's always the risk that sponsored names can and do change - Wigan's JJB/DW being a recent example - making the game outdated.