Tony Mowbray again felt his side's lack of cutting edge proved decisive as they slipped to another defeat at Coventry.
Boro striker Leroy Lita missed a penalty while Coventry's Marlon King converted one to settle the game and leave the Sky Blues in the play-off picture
Mowbray said: "We missed a penalty and they scored a penalty.
"I thought we controlled the game reasonably well after the first 20 minutes where they had a number of free-kick and crosses into the box.
"We didn't really feel threatened, particularly in the second half.
"We are very disappointed to lose a game we didn't think we should have done but there you go, that's football, you have to look at the positives."