Derby midfielder George Thorne says he still cannot bear to talk to Harry Redknapp about their 2014 play-off final defeat by QPR, despite the ex-Rangers boss now working for the Rams.
QPR won the Wembley final 1-0 and promotion to the Premier League.
Seven Derby players from that final are part of the squad which has secured a place in this season's play-offs.
"We don't talk about it too much because it is a bitter memory for us," Thorne told BBC East Midlands Today.
"He said to me that he thought I played well (at Wembley), but I didn't want to continue the conversation."
Since Redknapp joined Derby as a football advisor in March, the East Midlands side have won five of their six games.
And Thorne said the Rams, who finished outside the top six last season, feel they have "unfinished business at Wembley".
Tuesday's win over Bristol City, which took their winning run to four games, confirmed their play-offs place with three games left.
Two of their remaining matches are against potential play-off opponents as they host sixth-placed Sheffield Wednesday on Saturday before travelling to Brighton next week.
"The three games now are about building momentum and maintain the winning streak that we have got going," Thorne added.
"Two years ago we took a lot of momentum into the semi-finals and I do believe that was a help to us.