However, many of them decided to go elsewhere on Saturday afternoon to get their footballing fix, from The New Saints and Marine to Manchester City and Aston Villa.
We asked those on X, formerly Twitter, to send across their photos from the games they attended instead of Blackburn – with 16 different grounds mentioned.
And here are 32 superb pictures of those Pompey fans on the road...
9. Wrexham v Exeter
Kevin Stokes: Wrexham v Exeter. We made it to Blackburn 15mins before the pitch inspection! and got in the Racecourse Ground 2mins before kick off. Wrexham ticket office, stewards and nearby fans all very welcoming. Photo: None
10. Aston Villa v Crystal Palace
Ben Pay: Very close to going to Northampton v Cambridge. Ended up at Villa Park!! Photo: None
11. Huddersfield v Charlton
Eve Fisher: Huddersfield v Charlton, in the away end. 2-1. Photo: None
12. The New Saints v Penybont
Steve Whitmarsh: The New Saints (3) v Penybont (2) JD Cymru premier league top of the table clash at Park Hall, Oswestry. Jumped off M6 at Crewe when I learnt the Pompey game was off. Penybont (Bridgend) are my local side and I try and watch them whenever I can. They play in Royal Blue also. Photo: None