Middlesbrough reached the quarterfinals of the FA Cup with an own-goal from Sheffield United goalkeeper Patrick Kenny in extra time to beat the League Championship club 1-0 on Wednesday.
Kenny helped the ball into his own net in the 114th minute after a shot from Mido rebounded off the post. The match went into extra time after a scoreless 90 minutes. The original match also ended 0-0.
Middlesbrough hosts Cardiff _ another League Championship side _ in the quarterfinals on March 9.
Kenny had kept out Middlesbrough's attack until seven minutes remained, twice making saves from Afonso Alves and also stopping attempts from Luke Young, Stewart Downing and Tuncay Sanli. James Beattie nearly won it for Sheffield United in the 90th, but just shot wide.
"We had plenty of chances to win it, but the longer it went on the more it looked like it was going to penalties," Middlesbrough manager Gareth Southgate said. "But we have shown a lot of heart and character this season and we showed that again. Everyone left in the last eight of the FA Cup will think they are in with a great chance."
It was Alves' first start for Middlesbrough and the club's record signing started up front with Mido. Striker Jeremie Aliadiere began a four-match suspension for a red card he was shown in the 3-2 loss at Liverpool in the English Premier League on Saturday.
In the other quarterfinals of the FA Cup, Manchester United hosts Portsmouth and Chelsea is at Barnsley on March 8. Bristol Rovers hosts West Bromwich Albion a day later.