Pompey’s trip to Crawley has been put back a day to accommodate Sky.
The Broadfield Stadium fixture will take place on Sunday, September 9, with a 3.30pm kick off.
The clash, which represents the first-ever between the clubs, is to be televised live on Sky.
Meanwhile, Pompey’s Good Friday (March 29) visit to Preston will now kick-off at 5pm.
The game has been switched to a later kick-off following a request made to Preston by the large local Catholic community.
The fixture had already been moved once – from Saturday, March 30 – to give both sides more time to recover for their Easter Monday fixtures.