Fulham keeper Marcus Bettinelli says his handling error against Sunderland in the FA Cup last week will not affect his confidence in the long-term.
The Whites lost the fourth-round replay 3-1 after the 22-year-old fumbled a cross over the line to gift the Premier League side an equaliser.
"The midweek game was a huge mistake from me, but it is one I can't take back," he told BBC London 94.9.
"I've just got to get my head down and get on with it."
Fulham boss Kit Symons backed Bettinelli following their Cup exit and the stopper is grateful for the support he has received from everyone at the west London club.
"I've been out on loan before, made mistakes and come back from them. You learn from experience," he said.
"It was personally horrible for me but I have a great bunch of lads and a great manager behind me. I had some great messages from the fans."
However Bettinelli admitted that, because of the mistake against Sunderland, he was "a bit more apprehensive and nervous than usual" ahead of Saturday's Championship match at home to Birmingham.
The academy graduate was caught out again against the Blues, when David Cotterill's inswinging free-kick from the left flank drifted into the top corner at the back post.
"Based on where the free-kick was and where it went in, most goalkeepers would look at themselves and say the could have done better," Bettinelli said.
"You'll have to ask him whether he meant it. I was expecting it towards the goal because they had quite a few big lads.
"I won't hold myself full responsible but I'll have to watch it again and see what I can do better next time."
Following loan spells at Dartford and Accrington, Bettinelli has established himself as number one at Craven Cottage this season, making 28 appearances so far in 2014-15.
"It's lovely to finally establish myself as a first-team goalkeeper here," he added. That was always the aim in the long-run but it's probably a couple of years before I expected it."