Hull KR coach Tony Smith admitted Jamie Ellis’ missed penalty goal was the defining moment in the match.
The Robins fell short to a 25-16 defeat against rivals Hull FC at the KCOM Stadium on Friday night.
Ellis missed a shot at goal in the second half which would have extended the Robins’ lead to six points at the time, only for FC to go down the other end and score to nudge them back in front.
Smith said: “The big moment for us was the shot at goal, which hit the post. Instead of going six up, we go down the other end and concede a try on that next set.
“It’s a huge turnaround but I think psychologically it turns the game a whole from where it was. We will learn from that.
“The effort, the spirit and some of the play we did was very encouraging. I’m really proud of how we go about stuff.”