Norwich are seven points clear at the top of the Championship after being held to a goalless draw by Middlesbrough.
Canaries midfielder Emi Buendia was sent off in the second half for a second bookable offence, however Neil Warnock's side failed to take advantage and find a winner.
Daniel Farke's side will see their lead at the top cut to four points if Swansea defeat Rotherham later this afternoon.
Middlesbrough are seventh, two points from the Championship's play-off places.
