Franck Queudrue has taken responsibility for both Fulham's goals that condemned Birmingham City to yet another away defeat and pushed them closer to relegation.
The 29-year-old Parisian, who came on as substitute at half-time for the injured Liam Ridgewell, lost Fulham captain Brian McBride for the first goal and then gifted the second goal to Norwegian substitute Erik Nevland with a poor back-header.
However, he took responsibility for the mistakes and vowed the that Blues players would not give up hope of avoiding the drop into the Championship.
Blues face Blackburn Rovers at St Andrew's next Sunday on the final day of the season, while Reading and Fulham face away trips to Derby County and Portsmouth respectively - only a victory over Rovers in front of their home fans will give Alex McLeish's side a chance of survival.
"It was a set-piece again," said Queudrue, pointing out what has become Blues' Achilles heel this season.
"McBride was my player. I just got my shirt pulled by Brede Hengeland as the ball came in and it gave McBride a couple of yards and it was enough to give him a free header. I had just come on and I was watching McBride and I was following him but, in those two yards, I lost the ball and it gave him the two yards.
"For the second goal, when you are 1-0 down you don't try to kick it, you try to play properly but it was just a misheader. It led to Nevland's goal and from there, there was no coming back. I hold my hands up; I take the responsibility for the goals.
"At least we have a chance next week to do something because we are at home and both Reading and Fulham are away. I hope that the fans will be there for us at St Andrew's and respond for us.
"We have dropped points at home against Sunderland and against West Ham United. If you add up those points, we would have been okay.
"It isn't just this game, it is the whole season. We have not defended very well this season from set pieces, but we have to get it right for the last game of the season.
"We have a good home record so we need to keep that and take the three points, which is the only result we can take."
Despite Queudrue's mistakes, there was no doubting that Fulham were the better team on the day but the Frenchman believes it will be a very different Blues at St Andrew's next Sunday.
"Fulham played better than us," he said. "They deserved the win. We have to win now next week. There is no question of 'can we?', we have to. It is a must-win game for us; no other result will help us.
"The hope is there. We never give up and we are going to give everything like we did against Everton."
To compound his bad afternoon, Queudrue was also booked for vehemently protesting when referee Chris Foy failed to award Blues a corner after Radhi Jaidi's header from a Sebastian Larsson corner late on was obviously deflected wide. Within a minute, Fulham had scored their second goal.
"We were a threat at a set-piece in the second half and the referee got the decision wrong but he can't see everything," Queudrue said diplomatically. "It is just because there is so much at stake that it annoys us. We have to give him some credit because he can't see everything."