Cardiff City midfielder Craig Conway says they must not dwell on the end of their 11-match unbeaten run and bounce back away to Watford on Boxing Day.
Middlesbrough climbed above the Bluebirds into third in the Championship with a 3-2 win at the Cardiff City Stadium on Saturday.
"We've been doing well at home and then to lose the three points is very frustrating," said the Scotsman.
"We wanted to keep that run going and keep ourselves up there."
Cardiff felt aggrieved that they were not awarded a penalty early in the game, when Boro goalkeeper Jason Steele felled Kevin McNaughton in the area.
But the Bluebirds led 2-1 at half-time thanks to goals from Ben Turner and Aron Gunnarsson, and Conway says they should have gone on to win the game from there.
"We felt it was a blatant penalty but it wasn't given and, to be honest, we went on and I felt we controlled the game and came in 2-1 up at half-time," Conway added.
"That should have been enough without looking at the penalty to go on and win the game.
"To concede three goals at home is never a good thing but... that's just something we'll have to look at over the next few days and put it right.
"But we've got to move on to the game on Boxing Day."
Cardiff fell to fifth after the home loss and will be looking to get back amongst the pace-setters against boss Malky Mackay's former club Watford, who sit a lowly 18th in the Championship.