Sander Berge and Oliver Norwood both had goals ruled out for offside, while Billy Sharp dragged a shot just wide.

Blackpool, who stay 13th, saw Josh Bowler's shot hit the bar and CJ Hamilton blaze an effort over, having worked himself into a good position.

Head coach Neil Critchley had to settle for a point in his 100th game in charge of the the Tangerines, though his side were twice saved by the assistant referee's flag.

First as Berge scrambled the ball into the net before half time, only for the celebrations to be ended no sooner than they had begun.

Then after the break, the Blades were afforded a few seconds of delight at Norwood's crisp volley before that joy was also abruptly silenced.

Sharp had the Blades' other nearly moment as he was found at the top of the area by Iliman Ndiaye, but the veteran striker could not find the target.

Paul Heckingbottom's side slip to ninth, below Nottingham Forest on goal difference, with Barnsley visiting Bramall Lane on Saturday.

Blackpool head coach Neil Critchley told BBC Radio Lancashire:

"I thought it was a really entertaining 0-0. Sheffield United edged the first half but we had chances as well.

"I said to the players at half-time that we lacked a little belief and I said 'let's go for it'.

"We took the game to them second half and if any side was going to win it that was going to be us."

Sheffield United manager Paul Heckingbottom told BBC Radio Sheffield:

"It was a 2-0 win not a goalless draw. The first goal there are maybe three players playing Sander onside and the second, not one of our players is in the line of sight of the goalkeeper.

"The application and the character shown was good and we had to adapt on a pitch that's not great.

"We knew it might be a tough, hard-fought game and it was, and we deserved the officials to do their jobs properly as well."