After heavy rain in the north-east, the Black Cats' pitch has been deemed unsuitable for purpose and the clash with the Royals will now be rearrangedSunderland's Premier League clash with Reading has been called off due to a waterlogged pitch at the Stadium of Light.
After a morning of torrential rain on Wearside, referee Neil Swarbrick made the decision to postpone the game at around 13:40 BST.
The Black Cats were busy in the transfer window on Friday signing Steven Fletcher and Adam Johnson, with the decision denying the Scottish striker the chance of a debut against the Royals.
A statement on the north-east club's website confirmed that all tickets for the game would be valid for the rearranged fixture.
Reading announced via their Twitter account: "Nobody arguing with the decision, a sensible choice. Such a shame for our supporters - a massive thank you to all who travelled."
Black Cats midfielder Craig Gardner tweeted: "Gutted games off especially our fans and reading travelling 2 game roll on Tuesday now #itchingtoplay"
His team-mate David Meyler added: "Gutted the games off! Now let's get ready for Tuesday. #hawaythelads"