Boro were unable to prevent Norwich City from making it seven league wins in a row on Saturday evening.
There was little to choose between the sides, particularly in the first half as Boro pressed on for the opening goal, with Ashley Fletcher, Jonny Howson and George Friend all having chances.
It was City's Onel Hernandez who would provide the game's deciding strike in the second period, shortly after Dani Ayala had struck a post.
Boro rallied late on, with further openings for John Obi Mikel as well as substitutes Jordan Hugill and Stewart Downing.
But it proved to be a fourth consecutive one-nil victory for the Canaries in this fixture, one which sees Boro out of the play-off positions ahead of Tuesday's crucial 'game in hand' against top-six rivals Bristol City at the Riverside.
Watch highlights from the game in the video player above.