Have to fancy Arsenal even at the 1.50 with
Stan James/Paddy Power.
It will no doubt be a "reserve" side but lets not forget the same "reserve" side has won 3-0 AT Sunderland and also humped Reading 3-0 in London in this competition this season. To back up their quality further, they also won 2-1 at a strongish Man City and beat Everton 3-1 at Highbury with the same sort of line up last season.
Any one of those 4 performances will be enough to see of Doncaster IMO.