Struggling Doncaster Rovers have earned a point against the recently goal-shy Middlesbrough at home in the Championship.
Richie Wellens looked to put the hosts ahead early on when he was played in by Billy Sharp, but his effort from a tight angle was blocked.
The best early effort for Middlesbrough came from an Emmanuel Ledesma long shot, which failed to test new Doncaster keeper Sam Johnstone.
Rovers continued to push for a goal and went close when Chris Brown was denied by a good Shay Given save.
Paul Dickov's men squandered several chances as the first half drew to a close with James Coppinger, Paul Keegan and Wellens all missing.
After the interval, it was Middlesbrough who were profligate in front of goal with new signing Danny Graham, Jacob Butterfield and Mustapha Carayol all wasting chances.
Arguably the best opportunity fell late on to Kei Kamara, but his strike went narrowly wide of Johnstone's goal and Karanka's side had to settle for a draw.
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