Paddy Kenny had a deflected shot which hit the post but to be rebounded onto the palm of his hand but he couldn't keep it out and it went into the back of the net on 114mins.
Kenny who kept the Blades in the game throughout most of it was very unlucky to concede the goal in extra time.
Middlesbrough started brightly but couldnt turn any of their chances into goals. In the 2nd half the Blades and Boro couldn't be told apart from eachother as it was a tight game. James Beattie slid in the 91st minute at the far post but only could just put the ball wide and hit the side netting.
As the game went to Extra-Tme Both Boro and Blades kept pushing on for a winner but it was not to be. The 2nd half of Extra-time commenced and until the 114th minute nothing was happening.
Paddy Kenny tipped the ball into his own net as already stated. With just over 6 minutes left to push on and take the game to penalties the Blades had 2 handball appeals in the dying seconds. 1 turned out to be handball but referee Peter Walton waved away.
The Blades had a free-kick in the absouloutly dying seconds as Paddy Kenny ran up for the set piece. It went into Schwazer's hands and rolled the ball to Tuncay who ran and ran and ran but striker James Beattie caught up with and made a teriffic tackle to prevent the scoreline being 2:0.
The Blades get knocked out of the cup at Riverside and will not visit Wembley this season.