Middlesbrough interim head coach Adi Viveash says he was bitterly disappointed to lose to Coventry City in a meeting of the Championship's top two.
Boro had fought back from two goals level with the Sky Blues only to concede two late goals to slip to a 4-2 defeat as Coventry opened up a 10-point gap at the top.
It was a first home league loss of the season, while it was a first defeat in his short interim spell after a win and a draw in the other two games.
Viveash has been in the role following the exit of Rob Edwards to Premier League Wolves, but he will resume his role in the coaching team after the arrival of Kim Hellberg.