By Grey Whitebloom Championship side Blackburn Rovers host a wounded Newcastle United in the FA Cup fifth round on Tuesday night. The former Newcastle striker Jon Dahl Tomasson parted ways with Blackburn at the start of February after reportedly losing faith in the financial commitment of the club’s controversial owners. John Eustace, Tomasson’s replacement, is yet to oversee a victory for Rovers in four games. Eddie Howe can have no complaints about the economic might of Newcastle’s backers but there is no straight line between pounds and points. The Newcastle boss glumly concluded his side h…