The spoils were shared in Tuesday's U23 Professional Development League clash at Bramall Lane.
After an even opening first 65 minutes, Will Buckley scored for the visitors, only for Ben Whiteman to reply with a fantastic strike for the Blades, who were only denied the win by a string of fine saves by Wednesday stopper Cameron Dawson.
On a warm night, Wednesday were quickly out of the blocks and Rodney stung the palms of Long having got in behind Semple following Stobbs's ball down the right channel. At the other end Wright tested Dawson after good work by Chapman, before Whiteman fired a free-kick straight down the throat of the visiting goalkeeper.
Goalscoring opportunities were at something of premium as the first-half progressed. Brooks looked lively going forward, the highlight being leaving Loovens for dead before playing in Wright, whilst at the back marshalled by Ebanks-Landell the Blades looked comfortable.
But in the 44th minute, the home side endured a scare, Penny burst past Cummings and cut the ball back to Rodney who scuffed an effort wide with Long scampering across his goal.
There was a change at half-time the Blades with Hall replacing Wright, who had been on the wrong end of a couple of heavy challenges.
The start of the second-half was a cagey affair and United made a double change just after the hour, with Ebanks-Landell and Chapman replaced by K. Smith and Charlesworth.
But the game burst into life in the 68th minute and it was in the Owls favour. Substitute Preston found the run of BUCKLEY, he was initially denied by Long, before heading home the rebound into the empty net.
In response, Brooks got the better of Loovens and forced Dawson into a reaction save at his near post, before the Blades levelled in the 78th minute. Hall and Reed kept the composure to tee up WHITEMAN, who hammered home a effort from the edge of the penalty area via the underside of the crossbar.
United were the dominant force entering the final ten minutes, with Fleck firing at goal from distance, only to be denied by the full stretched Dawson. In the next attack, Dawson made the save of the night to deny Smith with a header from Hussey's pinpoint cross, then did well to keep hold of Whiteman's left-footed effort.
In injury-time, Dawson was again Wednesday's hero saving from Semple's downward header in front of the Kop as the spoils were shared.
Blades: Long, Cummings, Hussey, Whiteman, Ebanks-Landell (K. Smith 66), Semple, Chapmam (Charlesworth 66), Fleck, Wright JNR (Hall 45), Reed, Brooks.
Unused: Perryman, Hallam.