Chris Wilder's men turned in another strong away performance to collect a point at Bournemouth.
Chasing automatic promotion, the Cherries failed to seriously trouble Boro and the visiting Teessiders could have snatched the win.
There was a clear penalty shout turned down inside the first hall when Bournemouth defender Adam Smith appeared to handle a ball into the box.
The 0-0 draw keeps Boro firmly in the hunt for a play-off place.
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