The Black Cats dominated possession in the first half but couldn’t find a breakthrough against the compact visitors.
Blackpool posed more of a threat after the interval, especially from set-pieces, yet neither side could find a winning goal.
Sunderland also used all five substitutes and handed a debut to new signing Edouard Michut.
Our Sunderland writer Phil Smith has dished out his player ratings from the match:
5. Aji Alese - 6
Excellent in the first half, looked to tire in the second and struggled against the lively Corbeanu late on, but came through in the end. Ability to get up and down the flank impressive again. 6 Photo: Frank Reid
6. Corry Evans - 6
A typically steady display from Evans, who won the ball back in some really good areas. Struggled a bit at the start of the second half so no surprise he was brought off. 6 Photo: Stu Forster
7. Elliot Embleton - 7
Sunderland’s most incisive player, hitting the crossbar in the first half and denied in the second only by the referee failing to play an obvious advantage. Probably unlucky to be withdrawn when he did. 7 Photo: Frank Reid
8. Alex Pritchard - 5
Didn’t look at his sharpest as perhaps the second game in a few days caught up with him. Relentless in his pressing but not as threatening in possession as usual. 5 Photo: Frank Reid